35x300rum

[Norwest Alta]

I've made a decision that I'm gonna rebarrel my rem 700 xcr11 to a 35x300rum. Would a 26" barrel be optimal and what twist rate would I be wanting?

[Pathfinder76]

I would go no longer than 23”.

[Norwest Alta]

Any reason chuck?

[Salavee]

What application are you considering ?

[Norwest Alta]

Originally Posted by Salavee

What application are you considering ?

Near and far plain ol smacking things

[Soulcousin]

Originally Posted by Norwest Alta

Any reason chuck?

I'd guess that the expansion ratio of that cartridge would be a major factor. Don't need the extra barrel volume because the powder is all burnt up by then. Plus I'd be more concerned with the handling characteristics for smacking near things in brushy areas. Good luck with the build that sounds like a beast!

[Pathfinder76]

Originally Posted by Soulcousin

I'd guess that the expansion ratio of that cartridge would be a major factor. Don't need the extra barrel volume because the powder is all burnt up by then. Plus I'd be more concerned with the handling characteristics for smacking near things in brushy areas. Good luck with the build that sounds like a beast!

That’s pretty much it.

[elkhunter11]

The resulting cartridge would be similar to the 360 Imperial Magnum which existed as part of the Imperial Magnum line of cartridges. There is some reloading data on line that should provide a good starting point. The 360 Magnum rifles were sold with 26" barrels, and they did produce enough extra velocity over the 24" test barrels, that I would go 26", if I built one.

[Stinky Coyote]

Originally Posted by Norwest Alta

I've made a decision that I'm gonna rebarrel my rem 700 xcr11 to a 35x300rum. Would a 26" barrel be optimal and what twist rate would I be wanting?

Awesome call imo

[Norwest Alta]

Originally Posted by Stinky Coyote

Awesome call imo

Just dropped it off. Going with a 26" shillen barrel. Should be a gooder.

[Ruby76]

What bullets are you thinking? There's a 225 accubond, 225 barnes tipped tsx. Likely wanting a 12 twist?

[260 Rem]

In most cases, there is a direct relationship between barrel length and velocity, with longer barrels producing higher velocities ... however, there is a point of diminishing benefit. It is my understanding that virtually all the powder is burned within a few inches of the chamber but the hot gas produced continues to expand, which is then then the driving force behind the bullet. Is my understanding correct?

[Norwest Alta]

Ruby the gun Smith has built a few of them. I more or less left it to him except with the reminder that it is my money he's spending. Lol. I would like to shoot Barnes.

260 the smith said that a 26" barrel will work very well with 100grs of powder being burnt.

[Salavee]

Originally Posted by 260 Rem

In most cases, there is a direct relationship between barrel length and velocity, with longer barrels producing higher velocities ... however, there is a point of diminishing benefit. It is my understanding that virtually all the powder is burned within a few inches of the chamber but the hot gas produced continues to expand, which is then then the driving force behind the bullet. Is my understanding correct?

I believe it is peak pressure that is reached within 3-5 inches, not 100 % powder burn. Depending on the burn rate, powder continues to burn, sometimes even after the bullet has exited the barrel, but ideally, a few inches prior to exit. Immediately after peak pressure, velocity continues to increase due to the expanding gasses. After projectile acceleration decreases to a pressure equal the projectiles resistance, a rapid deceleration rate begins due primarily to barrel friction. Interestingly, in most cases, all this happens within 2 milliseconds .

[JD848]

Originally Posted by Norwest Alta

Just dropped it off. Going with a 26" shillen barrel. Should be a gooder.

Bang on and good choice,you will enjoy it more than you think,best of luck.

JD

[Norwest Alta]

Originally Posted by JD848

Bang on and good choice,you will enjoy it more than you think,best of luck.

JD

Thanks

It’ll be hard to give it a chance because of my ol faithful 338 wm but I’m looking forward to it. Should be done for a reasonable price as well because I told him that I’m in no hurry. Figured he might be able to find a barrel on sale if we wait. The muzzle brake I’ve got will work. He just has to open it up. Figured the xcr action shouldn’t need any blueprinting but would have to change the feed ramp angle.

Gotta decide now what I’ll use for optics. The original scope is a bushnell 6500 2.5-16 x42. I’m not a big bushnell fan. I’ve also got a minox 5-20x50 that might work fairly nice to see the fur fly.