Rechamber 300win mag to 300prc?

[408w]

Can it be done? If so, I am looking at getting a 300prc +p done for the extra speed over the regular prc.

 

[Bandit320]

I don’t think you could simply rechamber it for a PRC. I think the WM has a longer shoulder length than the PRC. Do you load for the WM? I’m getting 2860 out of mine with the 225 ELDM and I think I could get a little more if I wanted. If you want to simply rechamber your rifle you could probably try the 300 RUM.

I haven’t ever heard of a +P rifle cartridge.

Mike

 

[Ankeny]

You can rechamber if you set the barrel back.

 

[Bandit320]

I should add that my barrel allows me to seat the 225s out to almost 3.7” and I shoot it single shot.

 

[408w]

Defensive edge has a +p reamer they use and get close to another 100fps out of it I believe. 3100 FPS with a 215g Berger sounds pretty sweet to me.

 

[memilanuk]

I asked basically the same question on another forum... basically it sounds like a small amount of setback (<1/4") would be necessary to clean things up due to some dimensional differences between the two. I'm still waivering about whether to do this myself.

I'd be interested in hearing more about this '+P' variant you mentioned... sounds interesting!

 

[MOUNTIC]

For the couple hundred in a barrel blank why not get a new barrel. The smith is going to charge you to chamber it regardless of what direction you go. I wouldnt screw with the win mag barrel. Get a new one. Keep the win mag barrel as a backup barrel if you ever needed or wanted to spin it back on.

Does your chassis take CIP length mags? That's a better question before you start down this journey.

I would go Sherman mag before doing that throat mod the Shawn guy from Long Range Hunting said he designed. It's still a standard chamber but he says it's a step in the throat to reduce peak pressure.. never heard of anyone running this +p personally.. but try it out and let us know how it goes.

 

[Bandit320]

I didn’t see the +P reamer on their site, just the 300 Terminator info. What are rifle are you shooting and what results are you getting?

 

[memilanuk]

 

[Bandit320]

Interesting video and concept. The name is a little confusing especially considering how it’s used differently in handgun cartridges. You’d have to be careful those rounds didn’t find their way into another rifle that wasn’t modified.

 

[DAVETOOLEY]

3100FPS with 215's You're going to wreck brass regardless of the throat. Depending on barrel length that's beyond workable velocities in a 300 NM.

 

[408w]

Without changing the bolt face from the win mag is the 300 rum the direction to go for a 30 cal bullet or is there another option out there.

 

[b6graham]

sounds like a 30 Sherman Magnum, or at least almost the same FPS