RR - as promised, I did a brief velocity comparison of my 24" and 20" BHW 243 LBC barrels.
105gr Hdy BTHP
2.240" OAL
Varget 28.3gr
24" - 2794 fps avg
20" - 2709 fps avg
That's 85 fps difference.
I also tried a fireform load (for cheap x39 brass) with the Sierra 105gr SP and 4064, didn't write down the exact numbers but it ran about 2675 fps in the 20" and 2700 fps in the 24".
I need to load up more of the 105 BTHP bullet with Lever and compare those as well. I'll also be shortening this 20" barrel to 19", and will compare again. I'd be interested to hear what that same load of 28.3gr of Varget does in your barrel?
Hope that helps.
