Originally Posted by bwinters
Picked up a 25 Bob this week. I've never owned one but did assemble some loads for a couple 20 years ago or so. I see reg 257 brass and some designated 257 +P.

A. What is the difference?
B. Can you run +P data in non+P marked brass?
C. Is Nosler brass really worth $1+ per case?

I plan to run my Bob at 'modern' pressures (+P data). 25 Bob brass is a bit pricey so don't want to screw up my brass purchase.

Any good Bob data with 100 TTSX and/or 110/115 Nosler PT?

Thanks.

I use old white/yellow Winchester brass in my 257Ackley at +P pressures, never had an issue. Supposedly, the regular non +P has a thinner web, but I've never had an issue with any brass I've tried. To date, I've got R-P, the Win I mentioned above, which is ww-super stamped, Hornady and PMC.
Never had a case separation, cases rarely need trimming and primer pockets stay tight. I do not hotrod it, even though I am running around 58, 000psi and never go above 60, 000psi.
The brass is too expensive to wreck it, I look after my brass.

Cheers.