Impressive but perplexing load

[wvfarrier]

So.....

I decided to load some 250gr "Ruger Only" 45 colt loads for my Winchester 1892 (24" octagon barrel)

These 6 loads should have been between 1400 and 1500 fps however!!!

#1- 1840fps (avg)
#2- 1848fps (avg)
#3- 1850fps (avg)
#4- jumped to 1901fps (avg) Recoil was AWFUL
#5- 1904fps (avg)
#6- 1913fps (avg)
The steel buttplate was beating the stuff out of me.

I thought my charges were wrong so saved 1 rd of each group, pulled the projectile and weighed the powder charge. All were correct. These loads are WAY faster than they should be but every one of them shot .75" to 1.0" at 95 yards using a 3moa red dot.

The powder was H110, new starline brass and CCI large pistol mag primers. No pressure signs on the brass, except the brass is dirty which seems to always happen with 45 colt.

I do not think it wise to push them any harder, that top load is 1800ft lbs at the muzzle....from a 45 colt!!!!

Anyway, I am perplexed out by the velocities.....any thoughts?

[samsi]

What barrel length was referenced in the load data? Seems that most 45 Colt data is shot from a 7 1/2" barrel.

1800 fps is easily reached in 44 mag with 240 XTPs and H110 from a 20" carbine so I don't see much issue with the speed you're getting from 45 with a 24".

[Tycer]

Have you checked case volume? There might be a measurable difference between Starline and say Winchester