.375 rum brass
- Thread starter kac
- Start date
That is an option but I would prefer to neck down. The chambering is called the "338 Tomahawk". Fireforming takes about 10 degrees of taper out of the case, pushes the neck forward .002 and sharpens the shoulder. Necking down allows me to trim the neck down for a consistent thickness. Right now I'm going to .014. I've never actually tried necking up but my fear is that it will thin out the brass too much. I'm using 98.9 gr. Retumbo and .300 SMK.
nowarningshot
CGN Ultra frequent flyer
I have a 375 rum. Not common in Kanada. My last source was clearout factory ammo x5@$36/box. That was years ago, dont remember the source. You might try some of the country's largest shops, say Ontario and Northern BC.
I'm not parting with any, and the only other member here that i know who owns one is Pounder.
I'm not parting with any, and the only other member here that i know who owns one is Pounder.
nowarningshot
CGN Ultra frequent flyer
Any rum brass works except the easiest 338 rum. The 338 rum is a slightly shorter case to allow for long high bc bullets to fit magazines.
Three thoughts. Firstly, you would have to run it through several intermediate expanding balls, to minimize stretching and crushing too many. Secondly, the process of expanding from .284 to .375 could seriously thin your brass. My rum load pushes 96gr of propellant. Be careful. Thirdly, mainly because of #2, and also because of availability wouldnt 300rum be a better/easier proposition.
Personally, i didnt have a great problem finding brass. The 375 rum isnt a plinker for me. In about 18 years I've put about 120 rounds through it. I have about 250 brass, including 80 factory ammo yet go be fired. I also bought an identical M700 lss, spun off the barrel, replaced it with a 300rum barrel and sold it. Cost to switch was negligible, and i now have a NOS barrel for replacement. The Rum is not a barrel burner when used for my purposes, hunting in the BC peace, where I've lost a Moose to 4 legged hunters.
