Which powders are these Bill? I've heard the comment many times but no specific powder referenced. I ask with honest curiosity, because I know in theory 38 should be able to hold a larger charge of slower powder, but in practice I run into a lot of 38 guys running faster powders with heavier bullets than I do in my 9.
I'm sure I'll misstate one but how about 3n37 3n38 AA7 n105 to start? I only use 115gr bullets so a heavier bullet might open possibilities
Well Bill, I've never used any of those powders, but I use SP2 and VV says 3N38 can use the same data so that's where I base my assumptions:
I've made 181PF with a 115gr bullet over 9.5gr of SP2 (I pushed the charge weight all the way to 10.0 and didn't get any more velocity), I I would assume similar results from 3N38; 3N37 is faster and according to the VV published data takes roughly 85% of the charge weight to make the same velocity, so that should be no problem; N105 is slightly slower than 3N38 (the data shows ~1.5% more powder for the same velocity) so since my normal load is 9.3gr of SP2, I would think 9.4-9.5gr of N105 should safely make major; AA#7 is certainly too slow to make major in 9mm as it seems to take ~15% more powder than 3N38 to make the same velocity.
I have read posts from multiple users here that say they shoot 9 Major with both 3N38 and N105 (if I can get my hands on some I intend to try both).
The point of my previous comment is that I don't know anyone shooting 38 super using powders in this range, most guys I talk to (and who's pistols I've shot) are loading HS-6 or AutoComp under a 124gr bullet so while I know 38 super has the potential to create more gas, but I think there are a lot of 38 shooters not using that potential. On the contrary, I think I am squeezing every pit of potential out of the 9x19 case and am very happy with it (that's not to say I will never borrow/buy a .38 super gun, do my own load development and fall in love ).