Home Forums Hunting & Shooting Custom Rifles & Wildcats What does it take to turn a 7 RM into a 7 STW

On a Win 70 Classic action w/ a 26 inch barrel.

Obviously a rechamber, move the bolt stop, and pull the spacer out of the back of the magazine. Is there anything I am missing?

Is there a source for a long mag box, which would be cheaper than altering the original?


I purchased this rifle from Gunbroker about three months ago, intending to rebarrel it to 264. But then I had the barrel turned down on another Win 70 Classic in 264. It had a 27 inch varmint weight barrel with about thirty rounds down the tube. It is a fine magnum sporter weight rifle now. I don't think I need two identical 264s.

The Winchester in question appears in all respect to be practically brand new. The jewelling is not worn on the bolt, and the lands look fresh in the borescope.

But I have no interest in shooting a 7 RM. I have a Ruger #1 in 7 STW and about 400 rounds of ammo. So that is all covered.

The 70 is a very heavily compromised platform for such things. You haven't the COAL or RPM,to do worth a fhuqk,if only because bullets matter wayyyyyy more than headstamps. Hint.

Easy pass,from any/all angles on a 70,when an OEM 700 7mm RemMag will Smooch and stabilize .796 BC 180's as issued. Hint.

Thank me later.

Just sayin'..................

Thanks,

All things considered: I have the rifle already, and need to do SOMETHING with it. I will never load higher BC than a 160 gr Sierra SPBT or 160 AB. So the twist will be sufficient for my meager needs, as will the limitations of the mag box.

I will not be attempting targets beyond 600 yds. Nor do I shoot much in the wind.

Despite all its limitations, which I recognize, it should barely suffice.

I have accumulated several 700s, four. But they are all SA. 260 and 7-08. My means are as meager as my needs. Grin

Spend $.99,place a For Sale sign on it and walk away. Win/win/win. Hint..............

This Sendero started life as a 7Mag.



I stand to be corrected but I'd venture to say, someone used a reamer to punch it to 7STW.

Seems to work just fine!





yup!





GWB

That Sendero is a good looking rifle. Is that an HS Precision stock on those?

At the same time I bought my #1, my buddy bought a Sendero in 7 STW. He tried 140s, 150s, & 160s with several powders, as well as a couple different factory loads.

2 1/2 to 3 MOA is all he ever got out of it. What a disappointment. Of course my #1 was not doing any better at the time. But I knew to expect a good chance that would be the case with it.

Maybe it was him, maybe not. He could thread needles with his 270. With the weight of the Sendero, I don't think it recoiled much more than the 270.

Funny story? or just sad. He purchased a Springfield Armory 4-14x56 illuminated scope to go on it. It cost more than the rifle.
The scope had this reticle, calibrated for the M1A in 308.



He absolutely could not figure out why the range hash marks were not dead on for his rifle with 140s at 3400 fps, despite my many attempts to explain the trajectory differences.

A 700's vastly superior COAL grants numerous favors,compared to the schitty confines of a 70. Hint.

I've had 700 based STW's in both OEM and Custom's. I'd MUCH prefer to put the COAL latitude to work with GOOD bullets(7mm RemMag),rather than make it recoil more and get louder with schit bullets in STW. Absolute Goat Fhuqk in a 70. Hint.

SA scopes are absolute garbage and Joe Average is fhuqking CLUELESS,as you gals obliviously attest. Hint.

Fhuqking LAUGHING!..............

No doubt about that!
I was not aware they were again available foe civilian purchase. But I see Midway has some. I ain't buying any.

Just started opening some Mail and here's 1000 words on 70 STW's and 3.620" being the COAL ceiling. Hint.




300 Super/STW here,with DEEPLY seated 155 Skinner that's no joy in the 70 box. Hint.




Pardon my shooting it all ladies and then some. Hint.

Fhuqking LAUGHING!.................

The STW, RUM, H&H all hamstring you pretty good from a 70 as BS mentions. While some can shoot well with the right combination, you have no moves other than mag length for adjusting your bullet which don't leave much, if any room with most of todays sleeker nosed bullets.

By the time the bullet is stuffed way down in the STW to make it function, it don't net you a whole lot of capacity gain over the Rem Mag and it generally won't be as flexible.

I'd be thinking hard about a 7 PRC on that action, but you'd likely want to rebarrel to a 8 twist barrel for shooting heavies. PRC will jive well in the LA 70 size action. 180s at 3k.

the 28 Nosler wipes it's azz with the 7mm Purse and flushes it

Pretty sure if it was me I would play with the 7 Mag as it resides before making any rash decisions. With the right pills they can be a hammer and an accurate one to boot... then you can always follow Stick's advice if it doesn't work out and send it down the road. Lots of demand for Win 70's in 7 Mag these days..

I would agree, but wouldn't the 28 Nosler require a rebarrel?

"I will never load higher BC than a 160 gr Sierra SPBT or 160 AB. So the twist will be sufficient for my meager needs, as will the limitations of the mag box.

I will not be attempting targets beyond 600 yds. Nor do I shoot much in the wind."

Just use it as a 7mm Remington Magnum

My favorite of the big 7s was the Weatherby on a long Remington action.

I am set to load, and have hundreds of brass each of 22-250, 22-243AI, 243, 6mm, 6mm-284, 25-06, 260, 264, 270, 7-08, 7 RM, 7 STW, 308, 30-06, 30-06AI, and 300Win mag. The last thing I need to do is add another chambering with associated dies and brass to the mix.

All of my stuff will end up in the hands of my kids and grrandkids in a few short years. None of them have any use either for targets beyond 500 to 600 yds, nor esoteric cartridges like the RUM, 28 Nosler, or a PRC.

Actually the 7mm Hornady 162 gr spire point boat tail has done every thing I have asked of it for over twenty years.
I mention the Sierra 160 and Nosler AB 160 only because they have also proven to be as accurate in my #1 as the Hornady. I am sure they would be equally as effective on game if asked to serve in that regard.

At this point, the rifle will remain as is 7RM, or get a new barrel in 264, or get rechambered to 7 STW. That ball is still up in the air.

I am still waiting to bed it, depending on if it gets a new barrel or not.

Ah, interesting data for the decision. My current STW loads are 3.712" COAL with the 162 Hornady and 3.768" with the 160 Sierra.

That takes the STW off the table as far as I am concerned.

Thank you 'Stick for the information concerning mag box length.

Maybe toss a coin, rebarrel it to a proper 264 and give it to a grandson, or bed it as a 7RM and give it to a grandson.

Thanks PF, that’s sorta what I was trying to say, but yours was much more to the point.