K&P 32” 375 RUM barrel for TL3 w/ brass and dies

K&P 32" 1:8 twist 375 RUM barrel for TL3 short action. Muzzle threaded 3/4x20. 1.35" diameter shank for ~5.5" and then tapered to 1.1". Has flats machined into the barrel for easy changing with switch barrel setup. Chambered by Michael DeLoach of 9 Run Gun. Weighs 8lbs 7oz.

You read that right. This is a 375 RUM barrel that I had cut for my TL3 short action to shoot ELR. If you are looking for the most affordable way to get into ELR, no question this is it. This barrel shoots the 390gr A-tip at ~ 2820fps w/ N570 into -1/2 MOA. Before I did this I called Zermatt and Ray said go for it, the action can handle it…so I did. Supersonic to 2450 yards at a DA of 5000ft…I got greedy and wanted even more out of it, and had it throated a little longer but it didn't like it. SAMMI spec was fine, so I set the barrel back an inch (from 33" down to 32") and now it has a fresh chamber in it that I've never even shot. I suspect it will be just like it was before…which was awesome.

Hornady Dies with micrometer seater.

74 pieces of Norma Brass. Started life as 300 RUM and necked up for 375 RUM. (Just as an FYI if you're wondering, 375 RUM ADG brass pressured out early and gave me a weird bolt click and signs of incipient case head separations. Usually ADG brass is the opposite of that but this happened in 2 separate batches so I recommend using Norma brass. In this instance it's WAY better).

Want to sell as a package. $550/shipped. If someone wants to shoot the 390gr A tip, I have several hundred (not sure exactly how many) that I could work into the deal. Otherwise will sell separately after barrel etc sells.

Thanks,

Chase

Very interesting, to say the least.

I've got a dumb question. Will it work on a TL3 long action, too?
What was the reasoning to go with a short action?
I assume you pull the bolt to eject a round?

It won't work on a TL3 long action as is because the tenon lengths are slightly different, but they are both 1-1/16x20. All you would need to do is have your smith chase the the tenon threads and cut them ~0.1" longer. TL3 short tenon length is 0.790. TL3 long tenon length is 0.890.

I used a short action because a) I only had short actions at the time b) it's the longest cartridge that you can load a round through the ejection port and then eject the brass without having to take the bolt out. So works like any other single feed. (Obviously, though, if you wanted to unload a unified/still loaded round then yes you still have to take the bolt out…but unless you had a Cheytac length action you'd still have to do that no matter what).

Thank you.

Are you saying that even a long action TL3 won't eject a loaded round?

I have been wanting a .375 RUM and this looks like an interesting option.

Sorry, with the A-tips loaded how I was shooting them the OAL is ~4.194" so probably not with them. But, if you use a different bullet (like a 250gr or 280gr) then yes you probably could feed from a mag and eject loaded rounds…that's how it was originally designed but on a "RUM" length action from Remington. That said, honestly in my testing (there's a whole thread on here about the 375 RUM for ELR) you probably could actually use RL16 or H4350 and even load the A-tips to mag length in a long action. You would give up ~150-200fps in velocity but man that would be rad…I've thought about doing just that thing but life has shut down my reloading game for the time being.

Will this barrel fit a Zermatt Bighorn Long action?
Thanks

Mannnnn.... Cool barrel

Earnhardt said:

Will this barrel fit a Zermatt Bighorn Long action?
Thanks

Click to expand...

See responses above. It can likely be made to fit by extending the tenon threads an additional 0.1".

how many grains of n570?

105.3gr. You can also get there w/ N565 but it's absolutely maxed out. 105.3gr N570 is the high end of the upper node, at least in this barrel but there is still a little room. Also, may be slightly different since it's a brand new chamber. Per usual though, YMMV. Be diligent and safe when working up a load if you're going to use that as a reference point in a different barrel. This was all uncharted territory when I got into it, and thus the load data in the 375 RUM for ELR thread is empirically derived.

This was 105.3gr N570 at 300 yards.

TTT. Open to offers. Poor man's/normal man's Cheytac. Lol.

$500

TTT. Someone needs this piece of artillery.