I didn't but the whole issue here to me is the spreading of dangerous information.
The "magic load" that has been posted here numerous times is way outta whack pressure wise. I am a neophyte with QL and basically only use it to find the powder that will give me the velocity I want, while filling the case.
There may be some way to compensate for twist but it is beyond my QL limitations. That is the exact problem...pressures may be closer to sane using a slow twist barrel. However a lot of people will not consider that a faster twist is going to increase pressures dramatically. IMO it is a recipe for turning a load that is already on the ragged edge into a time bomb.
It wouldnt matter if you could get the 125 to 4k within safe pressures with a fast twist anyway. Because the more I think about it the bullet would probably go poof as pointed out by Bountyhunter.
If you want to push the 125 at 4K you should probably ask Richard Franklin about building you one. And if you do get one just be careful not to put one of the hot loaded son of a guns in your fast twist 300.
I can run you a chart of appropriate powders when I get home but cant post them here because the alignment of the columns is screwy. I can tell you this, if my version of QL says your going to get 65K of pressure and you use that load your going to blank primers. Like I said I am not an expert using QL and I think I screwed up some settings in the program. It is very very accurate as far as determining the velocity for a given powder charge, but do not ignore the pressure listed by my version.
Originally Posted by Supermag
Did anybody run the program with different powders to see if there is a powder that might actually produce this velocity with lower pressures than stated?
I just used a free demo program from the internet and found some that produced much lower pressures than VV550 at this velocity. RL-15 (4028 @ 66542psi), imr4895 (4007 @ 65173), varget (3929@62667). All are 72 gr. loads (supposedly 100 % density) with the 125 BT.