This has me scratching my head.

[urcayuse]

So if the 7 PRC uses the 375 ruger as its parent cartridge then why does RCBS list different shell holders for the two cartridges??
#4 for the 375ruger and #38 for the 7 PRC.

[Battle Rat]

Same story with the 6.5 PRC.
I've been using a #4.

[Battle Rat]

I looked up Hornady and their chart shows the 375 and 7PRC using the same number.
Not sure what's up with RCBS.

[elkhunter11]

Originally Posted by Battle Rat

Same story with the 6.5 PRC.
I've been using a #4.

The #4 works with Hornady cases, but it won't work with ADG cases.

[urcayuse]

#4 seems to work on Peterson brass just fine.

[brewster29]

I have Hornady, Peterson and ADG brass. Both the number 4 and 38 fit all three. The only difference I can measure is the number 4 is about three thousandths smaller in the groove area.

[elkhunter11]

Originally Posted by brewster29

I have Hornady, Peterson and ADG brass. Both the number 4 and 38 fit all three. The only difference I can measure is the number 4 is about three thousandths smaller in the groove area.

My ADG brass is actually stamped Gunwerks. The #4 will not fit over the rim.