.375 RUM

[wadcutter]

I have used predator .338 caliber projectiles in the past and am considering building a rifle dedicated to shooting them in .375 caliber.

To keep costs down I am going to avoid the Snipe Tac and Chey Tac cases and rifles. The rifle I plan to build is going to be built on a Remington 700 action with a 30" barrel. The case I hope to use is a .375 RUM or .300 RUM case whichever has the most capacity. Do you think this a good idea?

I think that the case capacity of the RUM case will be large enough to obtain at least 2600 fps with the 350 grain bullet out of a 30" barrel. Do you think that this velocity is a
reasonable expectation from the RUM case? This should give some respectable down range performance with recoil that would be a lot milder than a SnipeTac..

The details of the bullets that I would like to shoot, show a B.C of .9 and a required twist rate of 1 : 12 for the 350 grain Predator Projectile. See... Predator Projectiles This seems a bit slow for a projectile with a B.C. of 0.9 Is this ideal or would a 1 : 9 or 1 : 10 be better?

 

[highridge1]

Re: .375 RUM

I think you could get real close to 2700 fps with a 30 inch barrel. You can hit 2600 fps with a 350 gr and a 26 inch barrel with the 375 RUM.

 

[marku]

Re: .375 RUM

I would say to go a different route. The BC on those bullets are great but remember velocity and BC is what makes a a great shooting cartridge. I dont think youll get the velocity out of it to compliment the BC of that bullet. Honestly id go .338 Edge or .338 Lapua. The Lapua Scenar as you probley know got a excellent BC and if Berger ever released their 300gr VLD its going to have a outstanding BC. Those bullets are really designed for the Snipetac line of cartridges I dont think they will work that well with the RUM. Get on JBM ballisitcs and start plugging in numbers to see were your at from a 300gr .338 to a 350 gr SMK in a .375. That will tell you if its worth trying or not. If I could have any LONG range cartridge it would be the .338 Snipetac.

 

[wadcutter]

Re: .375 RUM

I've got a .338 Edge. Looking for something to make a bigger hole!

 

[JWV]

Re: .375 RUM

My friend has a 375 RUM. I do believe it is based off the 300 RUM case. But we he loaded 350 gamekings at around 2600 fps with a 26 inch barrel. Its an alaskan model 700 that weighs like 5 lbs. Needless to say my should was blue.