New long range rifle arrives

[Ridge Runner]

I shoot some of the mil-surp ball powders, WC-872, and WC 868 and a couple more you start with H-870 data. there is also US-869 from hodgdon which is very close to 868, but possibly too slow for the lazer.
just was curious if you or anyone else ever experienced powder bridging in the 06 based small diameter wildcats, heard it was why the 25 WSM was scrapped by the manufacturers, and I know of one 257 dia. wildcat, The 257 Allen Mag (sort of a 257/338 RUM Imp.) that is only feesable to shoot with ball powders due to pressure spikes from bridgeing.
RR

[Rapier]

RR,
I looked into an old can of AA-8700 that I had for several years, I believe it came from a guy that stopped reloading for a 300 Wetherby and a 6mm Rem, anywhoo It appears to be a ball powder, Hum, if that is the case, is the surplus WC-868 about the same as H-870? I have seen the refrence before to the load data being close enough to start at an 870 starting load and work up. Is the 868 also a ball powder?

I am not sure about bridging. But, I do note that 4831 to be as accurate as it is, will produce some 30-50 SD readings, even at best accuracy, in my 6.5x06 guns and that is with shall we say serious compression.
Best,
Ed