375 RUM Build

[Orange Dust]

What difference does the PTG bolt make?

You can get them oversize and ream the action to minimum tolerences

 

[Whitetail312]

Just to update the post I started gathering parts and now have my trigger, oversized bolt, and put my barrel on order! Looking for any info on shooting the hammer 329 grain bullets if anyone has any

 

[Doublezranch]

How long of a barrel? What 375 did you decide on? My answer depends on your answer

 

[Whitetail312]

How long of a barrel? What 375 did you decide on? My answer depends on your answer

375 RUM +P chambering from Shawn and defensive edge. 30" bartlein barrel with a 1:8.5 twist rate.

 

[Doublezranch]

Excellent! What is the case capacity difference between the +p and standard rum?

 

[Whitetail312]

Excellent! What is the case capacity difference between the +p and standard rum?

It's still factory case capacity, the difference is in the way it is chambered. I attached a link explaining the differences.
https://www.defensiveedge.net/index.php/338-edge-p

 

[robert l]

While the bolt face is the same diameter as the standard belted magnum cartridges, the body diameters are different with the RUM body being decidedly larger in diameter. The Remington M700 action will handle the RUM cartridge (Remington Ultra Magnum), it's important to pay attention to the width of the opening in between the action rails. Action rails are cut to allow the cartridge to feed from the box by the follower up into the feed ramp. But there has to be enough material left to hold the remaining cartridges down. You may need to adjust the feed ramp as well.

.375 RUM
View attachment 138992

The RUM cartridges, like the WSM cartridges, require the magazine box with the triangular windows cut into them. Getting some cartridges to feed reliably is both skill and art.

From left to right: .376 Steyr, .375 Flanged Magnum, .375 H&H, .375 Ruger, .375 Weatherby Magnum, .375 Remington Ultra Magnum, .378 Weatherby Magnum.

I would have to disagree with the comment about having to use a window mag box. I use the wyatts cfe-09 4 inch box and have no problems feeding any ammo.

 

[Whitetail312]

I would have to disagree with the comment about having to use a window mag box. I use the wyatts cfe-09 4 inch box and have no problems feeding any ammo.

What round and COAL do you shoot?

 

[sable tireur]

I would have to disagree with the comment about having to use a window mag box. I use the wyatts cfe-09 4 inch box and have no problems feeding any ammo.

Except you have to cobble up the bottom of your action to make that box fit and now it's only use is with that box.

 

[Whitetail312]

Except you have to cobble up the bottom of your action to make that box fit and now it's only use is with that box.

If you buy a magnum bolt from PTG like I did, you negate that issue.

 

[Orange Dust]

It's still factory case capacity, the difference is in the way it is chambered. I attached a link explaining the differences.
https://www.defensiveedge.net/index.php/338-edge-p

I would love to have a 7WSM like they are working on.

 

[Orange Dust]

If you buy a magnum bolt from PTG like I did, you negate that issue.

The 4" box requires opening up both the action and the ejection port.

 

[sable tireur]

If you buy a magnum bolt from PTG like I did, you negate that issue.

You really don't understand the comment since it has absolutely nothing to do with the bolt. It is milling out the bottom of the action to fit that extra long box.

 

[robert l]

So it seems it's doable I believe. I can't find any bottom metal for the 375, would a 338 bottom metal work since they're both the same parent case?

I believe that you will need to use the wyatts cfe-0 that box will give 3.90 lenght.Any thing longer like the 350 smk if loaded out to max will be single load. and the action will need some mods to fit the 700 action.