Quote:
Originally Posted by robbt
I am starting to reload .357 ammo
with Lyman / Keith 358429
using 2400 powder... believe 15 grs too much...
in there k frame...
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Brian Pearce had a (4) page article in Handloader #248 (Aug-2007) about using milder loads in M19/M66s to avoid the premature loosening from a steady diet of magnum loads.
In short, he suggested limiting handloads to <30K psi, & preferrably in the mid 20K range.
He listed (7) bullets in his chart, one of which was the Lyman 358429, 173gr cast bullet with Alliant 2400. Seated to 1.667" OAL & using 13.0gr/2400 he recorded 1147fps from a 4" bbl, which is less than 30K psi, & is his suggested max. load for the M19.
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