I found the 125g Remington PSP's worked very well with H335. I pushed them to about 2650-2700 fps, and found them very accurate to well past 250 yards. The 150g Winchester PSP Power Point worked very well for me too, as it is not as elongated as some 150g psp's. For a blast I tried 110g Hornady psp's and IMR 4198 at a velosity of 2800 fps. There was no sign of preasure and they shot into 1" at 100 yards. As far as the rifles stretching brass, some are worse than others. I have a Stevens 325 that has a very tight chamber and has great brass life. The Savage 340 I load for has a slightly larger chamber, but I just partial size the brass by just pushing the shoulder back a hair, and brass life is good.