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Joined: Feb 2011
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Campfire Regular
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OP
Campfire Regular
Joined: Feb 2011
Posts: 2,217 |
Hello folks I am in dire needs of 270 STW load info anything on this cal. would be a big help . Thanks
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Joined: Dec 2004
Posts: 17,246
Campfire Ranger
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Campfire Ranger
Joined: Dec 2004
Posts: 17,246 |
If all else is equal, shouldn't backing off 7mmSTW data a bit and working up get you there with this uncommon chambering? If bullet weights are similar, you are only going down from .284 to .277. There could likely be just as much practical load variance due to chamber reamers, bore interior dimensions, powder lots, and brass capacities within 7mmSTW rifles as there would be in comparing two identical rifles in .270STW and 7mmSTW.
Now with even more aplomb
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Joined: May 2005
Posts: 1,829
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,829 |
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/prnqRjSh/270-STW.jpg) Cartridge : 270 Shooting Times Westerner
Bullet : .277, 150, Sierra SPBT 1840
Useable Case Capaci: 93.874 grain H2O = 6.095 cm³
Cartridge O.A.L. L6: 3.650 inch = 92.71 mm
Barrel Length : 26.0 inch = 660.4 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 58377 psi, or 402 MPa
or a maximum loading ratio or filling of 100 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
152 loads produced a Loading Ratio below user-defined minimum of 70%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
ADI AR 2218 100.0 92.2 5.97 3347 98.4 56700 18430 1.259
Vihtavuori N570 *C 96.2 87.8 5.69 3329 98.1 58378 17958 1.272 ! Near Maximum !
ReloadSwiss RS 76 *C 93.0 86.6 5.61 3324 100.0 58378 16397 1.269 ! Near Maximum !
Alliant Reloder-33 *C 98.1 92.1 5.96 3316 98.4 58378 17765 1.276 ! Near Maximum !
Ramshot LRT 99.6 92.9 6.02 3299 93.8 58378 17597 1.250 ! Near Maximum !
ReloadSwiss RS 80 *C 95.4 89.6 5.81 3298 99.6 58378 17132 1.285 ! Near Maximum !
ADI AR 2225 99.7 86.7 5.62 3291 100.0 58378 15710 1.264 ! Near Maximum !
Hodgdon Retumbo 99.7 86.7 5.62 3291 100.0 58378 15710 1.264 ! Near Maximum !
Vihtavuori N568 *C*T 95.8 86.5 5.61 3289 99.3 58378 16929 1.277 ! Near Maximum !
Vihtavuori N560 *C 88.1 77.9 5.05 3262 99.7 58378 16055 1.265 ! Near Maximum !
PB Clermont PCL 517 91.0 84.0 5.44 3261 100.0 58378 15808 1.269 ! Near Maximum !
SNPE Vectan SP 12 90.8 83.9 5.43 3260 100.0 58378 15769 1.269 ! Near Maximum !
Bofors RP30 95.3 82.5 5.34 3259 100.0 58378 16009 1.282 ! Near Maximum !
Norma MRP 2 *C 95.3 82.5 5.34 3259 100.0 58378 16009 1.282 ! Near Maximum !
Accurate MAGPRO 88.5 81.4 5.28 3258 99.1 58378 16307 1.274 ! Near Maximum !
IMR 7828 92.2 77.6 5.03 3255 99.9 58378 15587 1.255 ! Near Maximum !
IMR 7828 SSC 87.3 77.6 5.03 3255 99.9 58378 15587 1.255 ! Near Maximum !
ADI AP 2214 92.2 82.9 5.37 3251 100.0 58378 15344 1.250 ! Near Maximum !
Hodgdon H1000 *T 97.0 83.0 5.38 3249 100.0 58378 15305 1.250 ! Near Maximum !
ADI AR 2217 97.0 83.0 5.38 3249 100.0 58378 15305 1.250 ! Near Maximum !
Norma MRP *C 86.3 77.9 5.05 3246 100.0 58378 15355 1.276 ! Near Maximum !
ADI AR 2213 88.5 77.4 5.01 3245 99.9 58378 15468 1.250 ! Near Maximum !
Alliant Reloder-26 *C 85.0 79.0 5.12 3245 100.0 58378 15143 1.291 ! Near Maximum !
Vihtavuori 24N41 *C 99.6 91.8 5.95 3245 93.5 58378 16614 1.254 ! Near Maximum !
Alliant Reloder-25 *C 93.1 80.1 5.19 3239 100.0 58378 14808 1.270 ! Near Maximum !
Vihtavuori N565 *C*T 92.3 82.0 5.31 3238 99.8 58378 15884 1.289 ! Near Maximum !
Raufoss RA15 *C 88.4 77.4 5.01 3231 100.0 58378 15274 1.270 ! Near Maximum !
Bofors RP5/NP ~approximation 88.4 77.4 5.01 3231 100.0 58378 15274 1.270 ! Near Maximum !
Alliant Reloder-22 *C 88.4 77.4 5.01 3231 100.0 58378 15274 1.270 ! Near Maximum !
Winchester WXR 90.8 77.7 5.04 3231 100.0 58378 15306 1.270 ! Near Maximum !
Bofors RP15 90.8 77.7 5.04 3231 100.0 58378 15306 1.270 ! Near Maximum !
Norma 217 *C 100.0 85.2 5.52 3231 100.0 55142 16047 1.326
Bofors RP5 NT *C ~approximation 92.1 81.2 5.26 3225 99.1 58378 15483 1.248 ! Near Maximum !
Hodgdon H870 100.0 89.4 5.79 3223 98.6 54004 17040 1.327
ReloadSwiss RS 70 *C 80.8 74.5 4.83 3213 100.0 58378 14316 1.262 ! Near Maximum !
Ramshot Magnum 88.6 83.5 5.41 3210 100.0 58378 14683 1.275 ! Near Maximum !
Alliant Reloder-50 *C 100.0 93.6 6.06 3210 96.8 53360 17738 1.363
ADI AR 2209 85.8 73.8 4.78 3203 100.0 58378 14582 1.251 ! Near Maximum !
IMR 8133 Enduron *C*T 100.0 84.7 5.49 3199 99.7 53905 16240 1.331
Alliant Reloder-19 *C 86.2 74.6 4.83 3199 100.0 58378 14624 1.258 ! Near Maximum !
Rottweil R905 86.3 74.1 4.80 3194 100.0 58378 14509 1.267 ! Near Maximum !
Bofors RP14 ~approximation 86.8 75.1 4.87 3192 100.0 58378 14535 1.258 ! Near Maximum !
Hodgdon H4831 *T 91.2 76.7 4.97 3189 99.6 58378 14715 1.254 ! Near Maximum !
Hodgdon H4831 SC *T 87.7 76.7 4.97 3189 99.6 58378 14715 1.254 ! Near Maximum !
Vihtavuori N170 *C 99.9 85.5 5.54 3186 97.0 58378 15492 1.278 ! Near Maximum !
ReloadSwiss RS 60 *T 77.8 70.6 4.58 3183 100.0 58378 13635 1.268 ! Near Maximum !
Norma 204 *C 82.0 73.3 4.75 3181 100.0 58378 14327 1.255 ! Near Maximum !
Bofors RP4 ~approximation 84.7 73.3 4.75 3181 100.0 58378 14327 1.255 ! Near Maximum !
Raufoss RA4 84.7 73.3 4.75 3181 100.0 58378 14327 1.255 ! Near Maximum !
PB Clermont PCL 518 82.7 73.9 4.79 3181 100.0 58378 14110 1.267 ! Near Maximum !
Hodgdon H414 77.5 70.9 4.59 3180 100.0 58378 14076 1.265 ! Near Maximum !
Winchester 760 77.5 70.9 4.59 3180 100.0 58378 14076 1.265 ! Near Maximum !
Bofors RL16 TZ *C *T 81.6 68.8 4.46 3180 100.0 58378 13605 1.257 ! Near Maximum !
Alliant Reloder-16 *C *T 81.6 68.8 4.46 3180 100.0 58378 13605 1.257 ! Near Maximum !
PB Clermont PCL 511 79.4 73.2 4.74 3177 100.0 58378 14002 1.266 ! Near Maximum !
Ramshot Hunter 82.0 73.3 4.75 3175 100.0 58378 13985 1.267 ! Near Maximum !
Shooters World BMG 97.5 90.8 5.88 3172 94.2 58378 15388 1.267 ! Near Maximum !
Lovex D100 97.5 90.8 5.88 3172 94.2 58378 15388 1.267 ! Near Maximum !
Alliant Reloder-17 *T 77.3 70.1 4.54 3169 100.0 58378 13560 1.270 ! Near Maximum !
Elcho 17 77.3 70.1 4.54 3169 100.0 58378 13560 1.270 ! Near Maximum !
ReloadSwiss RS 62 80.4 72.9 4.72 3163 100.0 58378 13718 1.285 ! Near Maximum !
Rottweil R904 85.7 73.1 4.74 3163 99.9 58378 14133 1.252 ! Near Maximum !
Vihtavuori N555 *C*T 86.6 73.5 4.76 3162 100.0 58378 13757 1.298 ! Near Maximum !
Bofors RP36 ZT *C *T 89.4 75.7 4.91 3162 100.0 58378 13567 1.283 ! Near Maximum !
Alliant Reloder-23 *C *T 89.4 75.7 4.91 3162 100.0 58378 13567 1.283 ! Near Maximum !
IMR 4955 Enduron *C*T 89.1 75.0 4.86 3159 99.7 58378 14248 1.249 ! Near Maximum !
Winchester Supreme 780 85.5 78.0 5.06 3157 100.0 58378 14015 1.266 ! Near Maximum !
Somchem S385 86.3 75.5 4.89 3156 100.0 58378 13933 1.279 ! Near Maximum !
Hodgdon LVR 79.7 68.9 4.47 3150 100.0 58378 13407 1.264 ! Near Maximum !
Bofors RP4 NT *C ~approximation 82.6 72.6 4.70 3149 100.0 58378 13682 1.268 ! Near Maximum !
Vihtavuori N550 *C*T 79.3 70.1 4.55 3148 100.0 58378 13540 1.274 ! Near Maximum !
Norma URP *C 81.6 69.8 4.52 3147 100.0 58378 13403 1.272 ! Near Maximum !
Bofors RP19 ~approximation 81.6 69.9 4.53 3146 100.0 58378 13400 1.272 ! Near Maximum !
Vihtavuori N165 *C 91.1 78.0 5.05 3146 100.0 58378 13704 1.271 ! Near Maximum !
Hodgdon CFE223 *C 73.9 69.8 4.52 3141 100.0 58378 13285 1.266 ! Near Maximum !
Hodgdon H4350 *T 84.4 71.5 4.63 3141 100.0 58378 13485 1.254 ! Near Maximum !
IMR 4350 82.8 71.3 4.62 3139 100.0 58378 13451 1.254 ! Near Maximum !
Accurate 4350 80.7 69.8 4.52 3138 100.0 58378 13368 1.294 ! Near Maximum !
Somchem S361 85.0 78.4 5.08 3135 99.6 58378 13966 1.264 ! Near Maximum !
Lovex S070 82.0 70.1 4.55 3132 100.0 58378 13426 1.272 ! Near Maximum !
Shooters World SW4350 82.0 70.1 4.55 3132 100.0 58378 13426 1.272 ! Near Maximum !
Bofors RP7 NT *C ~approximation 78.1 68.1 4.42 3131 100.0 58378 13078 1.241 ! Near Maximum !
Lovex S071 93.9 76.9 4.98 3131 100.0 58378 13493 1.300 ! Near Maximum !
Accurate 3100 88.8 76.9 4.98 3131 100.0 58378 13493 1.300 ! Near Maximum !
IMR 7977 Enduron *C*T 93.9 80.4 5.21 3130 95.4 58378 14339 1.248 ! Near Maximum !
Somchem S365 82.6 71.1 4.60 3129 100.0 58378 12989 1.288 ! Near Maximum !
IMR 4831 85.6 70.9 4.59 3127 100.0 58378 13139 1.282 ! Near Maximum !
Bofors 12,7mmRA NC1214 Lot20115087 100.0 91.5 5.93 3127 89.5 52787 16825 1.374
IMR 4451 Enduron *C*T 79.6 68.1 4.41 3125 100.0 58378 13199 1.246 ! Near Maximum !
Bofors RP7 80.6 68.4 4.43 3125 100.0 58378 13321 1.260 ! Near Maximum !
Rottweil R907 80.6 68.4 4.43 3125 100.0 58378 13321 1.260 ! Near Maximum !
IMR 4007 SSC 78.0 68.5 4.44 3124 100.0 58378 13313 1.260 ! Near Maximum !
SNPE Vectan SP 11 76.3 68.2 4.42 3121 100.0 58378 12922 1.267 ! Near Maximum !
ReloadSwiss RS 50 76.2 68.6 4.44 3117 100.0 58378 13058 1.261 ! Near Maximum !
Ramshot Big Game 73.8 68.1 4.41 3116 100.0 58378 12811 1.267 ! Near Maximum !
Hodgdon H380 75.9 67.1 4.35 3116 100.0 58378 12999 1.271 ! Near Maximum !
IMR 4895 73.7 63.8 4.13 3113 100.0 58378 12816 1.268 ! Near Maximum !
Vihtavuori N160 *C 79.5 70.3 4.55 3113 100.0 58378 12799 1.270 ! Near Maximum !
Raufoss RA11 74.5 64.5 4.18 3112 100.0 58378 12800 1.267 ! Near Maximum !
Alliant Reloder-15 *C 74.5 64.5 4.18 3112 100.0 58378 12800 1.267 ! Near Maximum !
Bofors RP11 ~approximation 74.5 64.5 4.18 3112 100.0 58378 12800 1.267 ! Near Maximum !
PB Clermont PCL 516 73.4 67.6 4.38 3112 100.0 58378 12876 1.260 ! Near Maximum !
Lovex S065 81.2 68.7 4.45 3106 100.0 58378 12922 1.269 ! Near Maximum !
Shooters World Long Rifle 81.2 68.7 4.45 3106 100.0 58378 12922 1.269 ! Near Maximum !
IMR 4166 Enduron *C*T 79.2 65.7 4.25 3105 100.0 58378 12838 1.245 ! Near Maximum !
Ramshot TAC *C 71.7 66.9 4.33 3105 100.0 58378 12809 1.254 ! Near Maximum !
Norma 203B *C 74.8 64.7 4.20 3104 100.0 58378 12694 1.269 ! Near Maximum !
Bofors RP3 NT *C ~approximation 79.5 68.4 4.43 3104 100.0 58378 12721 1.252 ! Near Maximum !
Elcho TR140 - preliminary data 75.6 67.6 4.38 3102 100.0 58378 12702 1.265 ! Near Maximum !
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Joined: Nov 2010
Posts: 37,146 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,146 Likes: 1 |
Guess it depends on what you can find.
My fav 26 Nosler powder is Vv 570 with the Berger EOL 156 gr.
No experience with the other two you listed.
DF
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Joined: May 2005
Posts: 1,829
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,829 |
It's about half way down the list before QL has a powder I own. It's not like I don't experiment but damn!
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Joined: Feb 2011
Posts: 2,217
Campfire Regular
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OP
Campfire Regular
Joined: Feb 2011
Posts: 2,217 |
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Joined: Feb 2001
Posts: 8,754 Likes: 4
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
Posts: 8,754 Likes: 4 |
What weight bullet are you going to be using?
dave
![[Linked Image]](https://upload.wikimedia.org/wikipedia/commons/e/ea/Logo_Schmidt_%26_Bender.jpg) Only accurate rifles are interesting.
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Joined: Dec 2004
Posts: 14,488
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2004
Posts: 14,488 |
If all else is equal, shouldn't backing off 7mmSTW data a bit and working up get you there with this uncommon chambering? If bullet weights are similar, you are only going down from .284 to .277. There could likely be just as much practical load variance due to chamber reamers, bore interior dimensions, powder lots, and brass capacities within 7mmSTW rifles as there would be in comparing two identical rifles in .270STW and 7mmSTW. If I was trying to figure out how to load this one, I'd look at 7 STW data and apply it to .270 STW for bullets of equal sectional density. That seems to work out really well for deriving .280 Remington data from .270 Winchester data. Since there is so little difference in bullet and bore diameters between the two, a burn rate that works well in one will work about the same in the other. I would leave a little headroom for safety's sake in the .270 STW, though, and I'd watch velocity carefully.
Don't be the darkness.
America will perish while those who should be standing guard are satisfying their lusts.
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Joined: Dec 2004
Posts: 14,488
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2004
Posts: 14,488 |
Cartridge : 270 Shooting Times Westerner
Bullet : .277, 150, Sierra SPBT 1840
Useable Case Capaci: 93.874 grain H2O = 6.095 cm³
Cartridge O.A.L. L6: 3.650 inch = 92.71 mm
Barrel Length : 26.0 inch = 660.4 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 58377 psi, or 402 MPa
or a maximum loading ratio or filling of 100 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !
152 loads produced a Loading Ratio below user-defined minimum of 70%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
ADI AR 2218 100.0 92.2 5.97 3347 98.4 56700 18430 1.259
Vihtavuori N570 *C 96.2 87.8 5.69 3329 98.1 58378 17958 1.272 ! Near Maximum !
ReloadSwiss RS 76 *C 93.0 86.6 5.61 3324 100.0 58378 16397 1.269 ! Near Maximum !
!Did you create that yourself? I just updated my QL and I don't have the .270 STW in my cartridge database.
Don't be the darkness.
America will perish while those who should be standing guard are satisfying their lusts.
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Joined: May 2005
Posts: 1,829
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,829 |
That was created in QuickDesign then imported into Quickload. ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/xT29dqvs/270-STW.jpg)
Last edited by MickinColo; 11/16/23.
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