Hi all,
I am in the process of developing loads for a 505 Gibbs with Woodleigh 600gr PP.
Data is thin on the ground and what I can find is for very fast (in this case capacity) powders, such as RE15 and Varget. I have tried H4350, RE22 and RE25 with mixed results. I am after ANY sources of loads with modern slower powders in the 2300fps range with 600gr bullets. I realise that these levels will be higher than the original pressure parameters, but it is a modern rifle with modern brass and will handle the increased pressure, as the same basic case is used to make both the 505 and CheyTac hulls.
Thanks in advance guys.
Cheers.
My 24" barreled 505 Gibbs with 145 grs Retumbo under a 600 gr Woodleigh PP bullet will run a very accurate 2450 fps, same/same with 143 grs of the same powder under the 600 gr Woodleigh solid.
I ran these loads to max power to check relative relation between stock bolts and bedding with the walnut, all was good at those velocity/recoil levels.
Subsequent loads are loaded to a more sedate, yet I believe to be as effective 2150 fps, good luck, she's a helluva round.
