More powder more drop???

[RemingtonAI]

Ok, this weekend I noticed something interesting and wanted you get your opinions about it. I was doing a load work up for my .308 using both the Hornady 168 and 178 gr. AMAX and Varget. I was reworking up a load I have been using for a while because I had changed up my process a bit and upon initial testing something got all screwy. I will skip the details of the load because I think this is a universal kind of question.
I tested 3 different charges for 2 different bullets, a total of 6 groups at 100 yards. I noticed that with both bullets, the hottest charge actually had about 1 MOA more drop than the other loads. They were all 8 shot groups, because it just seems more conclusive than a 5 shot group and probably just as conclusive as a 10 shot group (in my opinion).
Why in the world would the hotter charge hit lower consistently with both bullet weights? They were also both the same amount lower (about 1 inch). This isn't a hang up in development because I was able to confirm that my old recipe was tighter than the others, and back to shooting well. So now I can give the testing a rest and go back to shooting at 600 yrds, and having fun honing my wind reading skills. I keep my targets from past testing so I am curious to go back and see if the same thing was present then as well. I think I may remember seeing this before but just not having an answer to explain it.
Any theories? Thanks in advance guys. This may be one for Fox and Skully

 

[dkhunt14]

If your sighted at 100 and don't change elevation on the scope a faster load will hit lower. The trajectory curve is flatter. Meaning the bullet didn't rise to your POA. Once you get past your zero it will be higher. Matt

 

[jds holler]

In pistol shooting, a faster load will print lower because the bullet exits the barrel sooner, and is less recoil affected. jd

 

[ballison]

Your faster bullet isn't dropping more, it's leaving the muzzle at a different point. It has to do with recoil and barrel harmonics. A faster bullet will leave the barrel quicker than a slower bullet (genius, I know!), so it sounds like the barrel for your faster charge is at a lower point than that of the slower charge. That's one of the reasons I use a 500 yd ladder test for my load development.

 

[RemingtonAI]

Holy smokes of course it will hit lower since it got there faster! Wow, I honestly cant believe I didn't come to that simple conclusion! Thanks guys! I as well do latter tests at distance (300 yrds) but I have already done latters at 300 and 600 with the same exact load. I only did it at 100 because the last test went so crazy that I needed to confirm the sheer accuracy level that I know I already achieved with the same bullet and load (when I used a slightly different brass prep process). Im sure this sounds somewhat obscure since I didn't explain in detail, but its not important. Thanks for the explanation! Jesse