H110 in 45 Super... Forums: squib or blow up... Really?

[@Mbartel500]

With those slower burning powders, you can't get enough powder in the .45 super case to cause an over pressure problem. You will run out of case capacity before the pressure curve spikes too high. Now the faster burning powders are another matter. The pressure peaks sooner, and when you get near 100% load density, your safety margin can go away very quickly. When I load the slower powders, I use . 5 grain increments when working up a load. With faster burning powders I use .2 grain increments. I NEVER use a compressed load with the faster powders. With slower powders I often use compressed loads. The slow ball powders like H-110, 296, Lil' gun, Enforcer, and others burn more cleanly, and more efficiently with compressed loads. Also, I use large rifle primers with the slow ball powders. Using Ramshot Silhouette and 120 grain Lehigh extreme fluted bullets, I am getting 2039 fps with over 1100 ft. lbs. of muzzle energy in my .45 super Glock 21.

[@danya822]

@@Mbartel500 Do you see any problems with the LR primers? I know SP and SR are dimensionally the same, LR are fractionally taller(?).

[@Mbartel500]

@danya822 in some cases they will be just barely above flush, but in the starline 45 super cases that I have, they are flush. I guess you could rub them across 800 grit sandpaper until they fit flush if you really wanted to use them. Also not all LR primers are the exact same size. My dial calipers show that they can vary by several thousandths in height.

[@motorgearhead]

@@Mbartel500 what powder charge are you using with that 120 grain Lehigh?

[@Mbartel500]

@ 16 grains

[@tommyrussell1415]

Always some loser on the internet telling people what they cant do with pure supposition backed with zero knowledge or research. Glad theyvwere full of shit n youre ok. Very good group BTW

[@motorgearhead]

Ran it through quick load. Pressure modeled similar to lil’gun so pretty sure wasn’t anything to be overly concerned over.

[@danya822]

Happy New Year! Enjoying the tests on this end! So QL was under by roughly 100fps, about what it was with lil gun? I know QL has a lot of parameters, do you think you don't have them all correct, or does it seem the modeling is just incorrect when it comes to these loads? As I recall you mentioned QL is normally much closer?

[@motorgearhead]

@ - happy new year. QL is complex and user error is a possibility. I usually have good results with modeling velocities. Lil’gun is the first I’ve seen not model accurately. H110 was about 100 fps faster than the model predicted. Lil’gun was probably 150 fps faster than the model prediction. Usually the model is within 50 fps of actual. I’ve even had results of about 10 fps of actual. Would appear pressure is not linear with some powders. The good thing is these powders are all much slower burning than medium or fast burning powders that even an increase doesn’t exceed capabilities of pistol since it’s good into Rowland pressures (40,000+ psi). This H110 powder is slow enough that pressure is certainly safe in 45 Super & possibly even as low as +P (23k or less). Haven’t backed the model against the observed velocity yet. I’ll do that if anyone wants to know. I’m headed out to test Alliant 2400 right now. It’s model suggests higher velocity than the H110 or lil’gun. At least before being corrected against actual. I’m really pleased with LG’s performance versus how the primers looked. I’ll try to post the 2400 results but not sure it will be today but maybe

[@danya822]

​​@@motorgearheadAnother idea, have you thought of running these with magnum primers? It seems they are recommended/generally spec'd in load manuals with 110, kind of curious if you have any, and if you'd see any difference with them, since you are already into generally uncharted territory here lol.

[@motorgearhead]

@ - I’m using win lg primers that are rated for magnum loads or so the box states. But yes primers do play into it for sure.