Brass?

To answer your question, yes. I had a very nice load using a certain brand of brass and then switched because someone gave me a batch of a different brand. Long story short the latter brass load blew primers.

Also, I have never had any luck with Hornady brass. Primer pockets go real fast in all my experience.
 
Hornady brass is typically lighter weight and more H2O capacity than others. Up to 20gr per case less (ie. 270) and 2-3 gr H2O more.
So yes, it does make a difference in velocity. My Hornady loads take +/- 2gr more of powder to achieve the same velocity. Many are therefore over book max charge value, but perfectly safe. In fact, I typically use book velocity, rather than load weight when doing load development (correcting as necessary for barrel length).

Hornady also has huge spread in case weight, like 10-11gr (I.e 270 Win 170-182 gr). However, H2O capacity is more consistent (<0.3 gr H2O spread over such a large range) - which I found quite suprising.
 
I have Frontier stamped 300WM and they are very good pieces of brass. Have several loadings on them, pockets are still snug. I believe Frontier was formerly Hornady.
Only Hornady stamped brass I have is re-formed 416 Rigby for my 338-416 Rigby Improved 45°. Have had 5 firings on them.
Running 60,000psi loads on them.
Have gone to 65,000psi but pockets are done with 3 firings.
Only brass I steer clear of is Federal, which were making the first lot of Nosler brass, which was junk.

Cheers.
 
I've used both have no problems with either. I've noted that the primer pockets from the get go on Nosler are super tight!.

No issues with Horn primer pockets. Now if I'm horn honking on the loads yes of course they'd be loosening up but that's just telling me to lighten the flock up on the charge!
 
I've had more consistency with Nosler over Hornady but Lapua is far better in my loads. I wish they made it in .280 AI. Peterson so hard to find now but the few pieces I have loaded were great. Brass definitely makes a difference but varies from loader to loader. Let us know the outcome.
 
I have had substantial pressure variations within lots of the same head stamp. rem/R-P, win, federal, nosler, lapua, RWS, PPU, Hornady, and most every other brass manufacturer. I have seen 3 to 30 grains variance with certain brass manufacturers in their lots of 250 or more. R-P, winchester, Federal, and PPU are the biggest offenders.
 
Depending on the case, I would expect the Nosler to hold a touch more to get the same pressures as the Hornady.

Nosler similar to Norma usually hold a little more.

If changing brass, drop about two grains from where you're at and work it back up.
 
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