brass too hot? help

[Benjerman08]

I recently shot around 80 rounds of .243 lapua,.243 ackley fireformed) brass while testing loads and target shooting. Some of the loads were definately too hot with flat primers, sharp edged primers and shiny ejector marks. I backed off a grain of the h414 that didn't show pressure and loaded about 40. For some strange reason after I got to shooting, the pressure signs reappeared. Flatter primers and ejector marks. They shot fairly well, so I went ahead and used them. After loading these shells again, my groups have gone to heck. Everything else is the same. Same powder, bullet, seating etc. My question is, can some of the brass that was shot too hot be causing my problems? Any recommendations? Should I pitch anything with an ejector mark? I am sending the .117 dtac out of the .243 ackley at around 3050 fps. Thanks in advance for any help.

 

[Benjerman08]

Ok, thanks Donovan,
What about the hot cases...would you throw them out?

 

[Preacher]

Donovan is spot on as usual about H-414...
No need to toss the hot brass, but if your able to do it I would recommend annealing them..

 

[Benjerman08]

Great. I went to fed 210 primers so I could see the heat coming a little quicker and switched to Reloader 25 today. I am glad to report I am back on track. As I tested loads from 44 gr - 47, the shots all touched and made one big ragged hole. This can be nothing but good. I talked to one of Tubb's guys and he said the 117's can come apart above 2950fps. I stopped at 47 gr and 2890 with no pressure signs at all. The Wyoming sun made the morning go from cold to warm while I shot. No temp problems like with the H414. More accuracy and no problems. Cool! and thanks to all. By the way, Tubbs people said that they will trade out the 117's for 115's if you send them back. I think I will.