Use a 338 RCM die to go from 375 down to 338, then use the 300 PRC die.
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Where to find 300 PRC brass
- Thread starter dragon798
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Use a 338 RCM die to go from 375 down to 338, then use the 300 PRC die.
Thank you much appreciated
How much? I'm interested [email protected]
Capt RB
Well-Known Member
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- Dec 1, 2014
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I have not done anything with the prc in awhile. I have neck bushings for 35(.385) and 8mm(.350) I will use in my prc die. I will anneal after the 8mm pass and after the 300prc pass then turn. I have a bunch of 110grn flat base bullets I will fireform with then ream and turn. I'm hoping that I can find 100pcs then I might sell the 375 stuff as I don't have the time to do all that at this point in time.
My approach is neck down the .416 to 375 Ruger (did that) anneal, neck down using a raised 338 RCM die (waiting delivery), anneal again and then run them through my 300 PRC die, load and send it! They are all based on the 416 Ruger so no taper and all same dimensions except length Any thoughts?
338 RCM not 300 RCM
That's pretty close, but it will be a bit more work than that. The shoulder on the 300 PRC is pushed back slightly farther than the 375 Ruger case. You can do this with the 338 RCM die once you get a feel for it, but you'll probably crush a few cases in the process. Ideally you'll want a 300 PRC case on hand to setup the 338 RCM die.
Here's another option, but one that won't work with all actions. You can form 300 PRC cases from 8x68s brass without too much effort, but the rim diameter is a little smaller than a standard .535" magnum bolt face. Some actions will work with the smaller rim, some won't.
left to right: 8x68s RWS brass, 375 Ruger case, 338/375 Ruger formed from an 8x68s case, 300 Sherman Mag (300 PRC Improved) formed from 375 Ruger brass, 6.5/375 Ruger from 375 brass, 7mm LRM formed from 375 Ruger brass.
You can see the difference in the rim and case head between the 8x68s case and the 375 Ruger case. The 8x68s brass will result in reduced case capacity, but not enough to cause a major drop in performance. I think it would actually be easier to form 300 PRC brass from the 8x68 case than using 416 Ruger brass.
I agree and purchased some 8x68s unfortunately my Defiance actions bolt face doesn't like itThat's pretty close, but it will be a bit more work than that. The shoulder on the 300 PRC is pushed back slightly farther than the 375 Ruger case. You can do this with the 338 RCM die once you get a feel for it, but you'll probably crush a few cases in the process. Ideally you'll want a 300 PRC case on hand to setup the 338 RCM die.
Here's another option, but one that won't work with all actions. You can form 300 PRC cases from 8x68s brass without too much effort, but the rim diameter is a little smaller than a standard .535" magnum bolt face. Some actions will work with the smaller rim, some won't.
left to right: 8x68s RWS brass, 375 Ruger case, 338/375 Ruger formed from an 8x68s case, 300 Sherman Mag (300 PRC Improved) formed from 375 Ruger brass, 6.5/375 Ruger from 375 brass, 7mm LRM formed from 375 Ruger brass.
You can see the difference in the rim and case head between the 8x68s case and the 375 Ruger case. The 8x68s brass will result in reduced case capacity, but not enough to cause a major drop in performance. I think it would actually be easier to form 300 PRC brass from the 8x68 case than using 416 Ruger brass.
Send it 284
Well-Known Member
I have about 90 2x fired Hornady 300 prc brass that I'd sell for $65 shipped if someone needs it
With all due respect give the OP first shot. He has his new build about to be delivered.
Send it 284
Well-Known Member
I just counted and there's 71 cases
Send me a pm if you want them
