Was out shooting my 338 EDGE today and getting the bugs worked out of the drop chart. I bought a new can of H1000 and I knew the lots have been on the hotter side. So I backed off to 91g instead of the usual 92g that I use. I loaded up 50 and shot about 25 of them with no problems. Today I set up on the 800 yard gong and I fire and notice something just wasn't right. Different kick, different sound, and holy $hit, smoke coming from my acion!! Checked my face to make sure I was still alive and everythign was all good. So I proceed to lift the bolt, (which wasn't hard to lift at all BTW) and out comes the case with a pierced primer. My first issue with this combo in almost 200 rounds. I"m not exactly sure if it was a hot load or not. If it was, wouldn't the primer have popped out of the case?? The primer is still tight and flush. I called a few people when I was out there and got a few different answers. One guy says dont shoot nemore, another says shoot one through the cronograph. I had my cronograph with me so I decided to set it up real quick and shoot a shot through it. I put on some safety glasses this time just in case the piercing issue happened again. The reading of this shot was 2920fps. This is out of a 28" bbl w/300g SMK, 91g H1000, CCI 250, 3.780" OAL. The primer did not pierce on this one. I only shot the 1 shell through the cronograph. I did however proceed to shoot 4-5 more rounds at the 1100 yard gong, all with no pierced primers. Do you think that primer possibly had a weak cup?? Or do I definately need to back down my charge to my originaly velocity of 2825-2840fps, wherever that may be with this new lot?? I just dont see how only 1 of them has done it when I've shot probly close to 75 of those loads doing 2900-2925fps. None of the cases really seem to show any real signs of high pressure, thats why it never occured to me that I was running that high of velocity. I know there was a recent discussion on this just a bit ago, and I had the same result with the prior pound of H1000. I put in the standard 92g and didn't even think to recrono them. When the talk around here was going on, I went and cronoed them loads and was getting 2925-2950fps. I never did have any problems with those that I loaded at 92g, no pierced primers or hard bolt lift anyways. But I know that velocity is definately pressure related, so Thats why when I got this last recent pound of H1000, I backed off to 91g. Guess maybe it wasn't enough?? I might just have to back down to around 90g or 89.5g to get back down to 2825-2840fps. I have 15 or so shells still loaded, what would you guys do? Shoot the rest of them up, or pull them and use the components to rework the load to my original velocity. Thanks Original work up with this combo was 92g H1000 which gave me 2840fps. So now I obviously know this particular can of H100 is a bit warmer.