Thread: 357 mag subsonic reloading data

Originally Posted by Muddyundy

Thanks Guys.
Yeah beam scale all my loads and have had a bit of a play around with Titegroup and also looked at the minimum load as being too light. I guess i will be doing a bit more exploring of the AP70 route as its the easiest to get. The data looks a little better using jacketed bullets using AP70 as the loads for lead versus jacketed is different . No doubt friction related.

AP70 could be too slow burning for Sub loads my best accuracy is between 6,5 grs and 7.3 grs with the 166 grain cast bullet it does over 1000 fps in a 6" pistol barrel
you are correct it is a friction thing cast bullets go faster than jacketed with the same powder charge due to less friction be careful with powder coated bullets they
are less slippery than lead, Always work down with sub loads not up specially with jacketed they are bastards to get out when stuck ,
A powder to try for subs is 700X shot gunners use it a lot so it is easy to find if there is a Gun club in your area.