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Any of you guys play with making a 7-300 prc yet. Just necking down 300 prc brass to 7mm. Basically a longer 7mm prc. Dimensionally everything should work. Mag box, feed rails bolt face etc.
Could you just ream a 7mm prc chamber deeper to the length and shoulder of a 300 PRC. Neck down 300 brass to 7mm. Would increase case volume increasing velocity. If you have how did it work? Or what is your thoughts? Ken
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I would think a 28 nosler would be easier but your project sounds fun. Good luck
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Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery. Winston Churchill.
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That would be a great round too.
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Joined: Apr 2011
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Campfire Ranger
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Campfire Ranger
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That’s pretty much the 35 Newton. I used 375 Ruger cases to make mine. The Newton has a longer neck but generally about the same deal.
Semper Fi
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Joined: Sep 2014
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I know guys who have rifles in 7mm-300 PRC, but they built them with new custom barrels, however I don’t see why you couldn’t rechamber an existing 7mm PRC barrel with a reamer.
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That’s my thoughts as well. I already have a couple 7mm Rem mags. How are they performing. I guess I’m curious on the average gain in velocity
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I had a 7-300Win. The 300Win and the 300PRC have pretty much the same case volume. I decided it wasn’t worth the effort or expense compared to a 7RM with a long throat. After using the 7-300Win and the long 7RM for about 15 years I decided I preferred a 270 or 280 or 284 for hunting. I did go through 3 or 4 of the 7mm barrels testing etc. More recoil and effort for no substantial gain.
Last edited by RinB; 12 hours ago.
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”. Antoine de Saint-Exupery. Posted by Brad.
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Forgot. The velocity gain was maybe 100fps compared to the standard 7RM.
Last edited by RinB; 12 hours ago.
“Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away”. Antoine de Saint-Exupery. Posted by Brad.
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Campfire Kahuna
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Campfire Kahuna
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Projectile selection,is going to do wayyyyyy more than cartridge selection. Hint.
A 7mm RemMag in a 700,with .796 BC 180's at 2900fps+,frosts all nicely and with aplomb,less ANY bullschit. I like mine kissing at 3.585",whether 280,280AI or 7mm RemMag. Hint.
Just sayin'.................
Brad says: "Can't fault Rick for his pity letting you back on the fire... but pity it was and remains. Nothing more, nothing less. A sad little man in a sad little dream."
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They built their rifles with a very specific purpose, to shoot high BC bullets out of a long barrel with a very fast twist. For them the marginal gain in FPS was worth the extra work and expense. And they like the fact they can neck down Lapua brass. Personally, I would not due it, especially in a rifle with a sporter barrel. Like others said, maybe 100 fps or so gain in standard length barrel. But if you happen to be a machinist and like the idea, go for it.
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It’s a Christensen 24” carbon fiber barrel. For 100 fps I’ll just leave it as is. I have plenty of 300 prc brass in ADG and Lapua. That’s why I was thinking of reaming the chamber deeper. Then I compound another problem with dies. Glad I asked. You have to know both sides to make a good decision. Thanks Ken
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