Well i have tired a few different powders and and have pretty good success as far as finding some decent load or lets say accurate. I just finished shooting 168 gr Ballistic tips over H4350. I started with 62 grains and worked up in half grain increments. Accuracy was ok, right at MOA until i hit 66.5 grains. I know it is higher than what is listed but i didn't show any sign of pressure as far as flattening primers or a sticky bolt. At 66.5 gr it shot 2 groups of 3 right at 0.5 MOA. ES was 12 and average velocity was 3197. Temp was 2 degrees celius. I was happy with that. The problem started when it came time to risize and reload. I am using redding deluxe dies. I had about 50 once fired brass and so i started the process last night. I tried just neck sizing but there was no way i could get the bolt to close. I seated the die deeper in small increments to bump the shoulder back. still no go. I have read lots with shorts mags and guys having to full length size only. I full length sized a few and at first the bolt was a little difficult. I seated the die a little deeper until I got the bolt closed firmly but not stiff. Im using remington brass and Federal 215m primers. I checked the brass after and found a bulge about a 1/4 to 1/2 inch up from the base.. I am by far an expert at reloading but have had success up to the WSM. Is this a headspace issue, die set up issue? Any feedback is apppreciated. Thanks.