Last Stand on Earth
Looks like 240gr Magtech Semi-Jacketed Soft Point will be the baseline. 1180 FPS is advertised. We will see that they do out of this 20” barrel.
I would put that case somewhere visible when you reload to remind yourself how close you came...most all other .45 Colt revolvers would likely have failed considering the extra room allowed for the expansion to get a little momentum going before the cylinder walls contained the pressure.Ok, I think I know what happened. Earlier I was testing 230gr 45 ACP bullets in 45 Colt. I loaded 2 then grabbed one from the batch with 250gr bullets to compare. Well... the 44 mags are right next to the 45 Colt box and they are identical. It’s entirely possible I fired a 44 mag from my Ruger Bisley 45 Colt cylinder. I took count of the 45 Colt brass on my table. I only see 2. I know I fired 3. It’s the only explanation I can come up with.
I thought nothing of it when I fired it because I was expecting 1,000 FPS and it clocked at 1,003 FPS.
Edit: that has to be what happened. The brass is too large for the 44 chamber. Ruger has earned a customer for life. I got lucky.
I used 10gr of Blue Dot in .45 ACP for close to 1,100 fps with 200 gr cast bullets. It was a well tuned (ramped, ported, and polished 1911).On to Blue Dot with 240gr plated bullets. XTP charge range is 12.1-13.7gr.
I loaded 3x @12.5gr and 3x @13.0gr
12.5gr = 1315, 1356, 1346 FPS
13.0gr = 1345, 1376, 1366 FPS
Honestly, 0.5gr only made 20fps difference even out of that 20” barrel so really not worth wasting the extra powder. 1370fps is 1,000lbs of energy so they are hovering just below that mark.