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exbiologist's picture
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What would you do?

So, I kinda made an impulse buy, which is starting to look pretty stupid.

I ordered a Winchester Model 70 Sporter in 7mm Rem Mag, that I thought I'd be able to easily convert to a 7mm STW.  Turns out I was wrong, as you have monkey with the bolt stop on an M70, and replace the mag and follower.  Not a big deal, but things add up quickly.

Also with this gun, I ordered 3 grade II walnut stocks with the intent of keeping the best one and selling the other two.  Once again, made a mistake in that in that the barrel channels will need to be opened because they were designed for standard barrel contours.  

None of these are necessarily major deal breakers, but, what was once going to be a simply plug and play with the stock, and a rechambering job that I could do myself with a rented reamer and headspace gauge, is now going to be a bit more expensive, and I need a barrel channel tool.

So, now what?  Can the whole idea?  Go forth anyway?  Compromise and do a 7mm Weatherby, Mashburn Super, or 7x300 Win?

Gun will arrive tomorrow.

groovy mike's picture
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shoot it first

Shoot it as is before you do anything.  You just might fall in love and decide to leave it alone!

exbiologist's picture
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that's the danger

Don't you know you're never supposed to shoot the donor?  It could ruin all your plans lol .  Right now I'm leaning towards doing that though and rechambering it at a later date.  But I will restock it.

Critter's picture
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You are between a rock and a

You are between a rock and a hard spot.  I think what I would do is do what I can and then have a gunsmith open up the bolt face for the 7mm Shooting Times Westerner.  That way you will of done 90% of the work yourself and farmed out only 10% of the work and end up with what you wanted in the first place. 

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7 mm Rem to 7 mm STW

The 7 mm Rem and the 7 mm STW have the same case head diameter (0.532"), the problem is that the STW case is 0.350" longer (as is the loaded cartridge), and therefore it requires a long magnum action vs the standard magnum action of the 7 mm Rem.

According to my Barnes Manual, there is very little difference in velocities between the 7 mm Weatherby and the 7 mm STW.  Converting a 7 mm Rem to 7 mm Wby only requires reaming out the chamber (and lengthing it 0.049") which, like you said, you could do yourself.  Same action, same barrel.

As for the wood, I have stocked or restocked 5 of my hunting rifles with full barrel glass bedding and floated barrels.  If you mix the color of the glass bedding right, you have to look hard to see the difference between the wood and the glass.

exbiologist's picture
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bolt face is fine

just gonna need magazine and bolt stop work for a proper fit.  The only machine work will be the on the bolt stop (where it hits the release, the bolt needs a slightly longer stroke to eject a round).  That's the only part I'm not equipped for and can't/won't be buying specialized tools for.  I can rechamber with hand tools and the magazine fix is easy but a little pricey to purchase the parts.

exbiologist's picture
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Ta da!

Well she's here, and is now a faux M70 Sporter Deluxe.  Turns out the barrel contours were the same between the standards and magnums, so a simple bolt on:

 

\

 

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Nice stock

Very nice figure in that stock, very pretty. (yea, guns are allowed to be both studly & pretty too!)  Yes

Critter's picture
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I think that I would of

I think that I would of bought it for the stock alone.  That's some purdy wood.

exbiologist's picture
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got two more....

I have two more stocks if you're in the market....   Yes

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update

Well...... it's official.  She's gonna be a 7mm Mashburn Super Magnum.  I called up PTG planning to kick the tires and hem and haw when they gave me an estimated delivery time on the reamer.  But they had one in stock, so I just bought the dang thing.

Also, that ugly stainless steel extractor is off being cerakoted in graphite black, which should look pretty close to real bluing.  Anyway, with the Mashburn Super, I'll be pretty close to STW velocities without having to do any magazine work(essentially a blown out, long necked .300 Win Mag necked down to 7mm).