I've been loading up for my Uberti 73 Win a mess of 44-40's based on information I gathered on this site.
I'm using Extreme hard cast lead Bullets, 200g rnf sized to .430", over 24.7g of IMR4198.....starline brass, win large pistol primers.
I tried a few loads with 25.5g and they were accurate but I didn't want to get that close to the max load with 1512 f/s. (200g rnf sized to .429" Oregon Lazer cast) Info from 44 wcf I believe.
Now, last night I came across some old threads where one fellow (didn't note his hame or handle) who was only achieving 1300 with 25g but I didn't see what dia. bullet he was using.
And to add to my confusion, there's a video on Utube where a fellow was using H4198 and achieving over 1500 f/s with 25.5g of that powder. Which I understand burns even slower than the IMR4198.
I was thinking (not normally a smart thing for me to do) that I'd get around the high 13's or low 1400+ f/s with my loads using the tighter fitting projectile.
So my question is: using a .430", will that increase the pressures significantly and velocity? Or Not?