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Does anyone know the max OAL for a cartridge using a Winchester M70 SA? There are some cheap M70 Ultimate Shadow rifles with CRF actions and I figure I might use one for a build. New barrel and stock and it should be good to go. Just don't know if I need to go LA or if I can use a SA. Thinking x57 case of some type. Maybe 257 Bob, maybe 7x57.
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This isn't precise because I measured these quickly with the rifle assembled and I can't get the caliper perfectly positioned. I measure about 2.83 to 2.86 inch. Ought to be OK for Roberts and for some bullets in the 7mm Mauser but not much room to spare.
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They will take about 3.1". Most have the mag blocked to 2.8'ish, but it's easy to get them to run at 3.05" or so. Perfect for the rounds you mention.
Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
Stolen from an erudite CF member.
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They will take about 3.1". Most have the mag blocked to 2.8'ish, but it's easy to get them to run at 3.05" or so. Perfect for the rounds you mention. Concur with this Rick. I have a late model NH built M-70 SA CRF that had a "spacer" or block that had to be ground off - not that big a deal. This increased the box length to 3.1" and the follower works just fine. This is a perfect sized action for my 284 win and would be excellent for any x57 cartridge IMO.
"Blessed is the man whose wife is his best friend - especially if she likes to HUNT!"
"Love the Lord your God with all your heart, soul, mind and strength, and love your neighbor as yourself. There is no commandment greater than these."
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Campfire Outfitter
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I'd sure like to convert my 7mm-08 NH built M-70 SA CRF to 7X57.
1st Special Operations Wing 1975-1983 919th Special Operations Wing 1983-1985 1993-1994
"Manus haec inimica tyrannis / Ense petit placidam sub libertate quietem" ~Algernon Sidney~
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They will take about 3.1". Most have the mag blocked to 2.8'ish, but it's easy to get them to run at 3.05" or so. Perfect for the rounds you mention. Concur with this Rick. I have a late model NH built M-70 SA CRF that had a "spacer" or block that had to be ground off - not that big a deal. This increased the box length to 3.1" and the follower works just fine. This is a perfect sized action for my 284 win and would be excellent for any x57 cartridge IMO. I have one rebarreled to 257R. The magazine has a spacer that would be easy to remove. But there is also a bolt stop that would have to be modified to allow the bolt to travelfarther to the rear. How hard is that to "fix". thanks
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Campfire Kahuna
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Campfire Kahuna
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Not hard. Just measure how much needs to go away, then remove the piece, grind off the amount you need (while keeping the same profile), polish off the burrs and reassemble.. The ejector will have to be shortened as well..
Ex- USN (SS) '66-'69 Pro-Constitution. LET'S GO BRANDON!!!
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Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
Stolen from an erudite CF member.
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Wow Rick, that's exactly what I'm talking about! At first, I wanted to do a build on a military Mauser. It looked like modifications to the action are going to run me way over budget. So, my next choice is a Winchester M70.
There are Ultimate Shadows for $574 locally in 243 and 308. Figured I could part it out and re-barrel with new stock and williams bottom metal. I even though about buying a featherweight and keeping the factory stock and just re-barreling. That would be spiffy. Those are going about $100 more locally and would save me money in a stock.
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I'd sure like to convert my 7mm-08 NH built M-70 SA CRF to 7X57. Swampman, I know a guy who could do it for you. My 284 win started out as exactly what you have. Basically, all he had to do was remove the spacer and ream the barrel. I have since added a McEdge to it I got from here. She weighs 6-6 and shoots 140 TTSX right at MOA in the 3050-3100 fps range. Couldn't be happier with how mine turned out. PM me if you are interested. bludog
"Blessed is the man whose wife is his best friend - especially if she likes to HUNT!"
"Love the Lord your God with all your heart, soul, mind and strength, and love your neighbor as yourself. There is no commandment greater than these."
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I've got a SC M70 S/A that was built into a 6.5x284. Just swap the mag box and follower out for a WSM box and follower and you're good to go. Or do as others have suggested and remover the spacer.
I never thought I'd grow up to be a grumpy old man, but I did, and I'm killin' it.
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Can a 7mm-08 be reamed out to 7x57? Seems like the 7x57 has more of a tapered case than the 7mm-08?
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