45 Auto 185 grain xtp load

[Joe Texas]

Objective: 1000 fps

Sig P227 3.9”
185 grain xtp
Winchester brass
CCI 300 primers
1.23 COAL

Test ladders shot with:
N105, N340, CFE Pistol

Only N105 got to 1000 fps.

Most accurate 1000+ fps load was 12.8 grains N105 - 1066 fps ES 15 SD 6 PF 197

CFE-P 8.0 grains 881 fps ES 57 SD 21 PF 163
N340 8.0 grains 924 fps ES 31 SD 11 PF 170

Chrono results attached.

 

[Charlie98]

Looking at some of my loading data, the slower powders are the only ones reaching 1000fps with that light of bullet; N105 is nearing BlueDot/2400 in burn rate, so that validates that. I am kind of surprised you didn't reach 1000fps with CFE-P... Hodgdon's starting data shows 1008fps; granted, they had an extra 1" of barrel.

Both of my .45's are 4" barrels, I've found I really have to redline the load to reach factory velocity with that missing 1" piece of barrel.