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.
cool