For background, gun = Sig P238, 2.75" barrel,
factory ammo, never one failure of any kind
reloads from latest Lyman book failed to cycle the gun at starting load and did not function until about the middle of the load range.
Factory Ammo chrono data:
PMC 380 95gr FMJ = 867 fps, SD 16 - pleasant to shoot
Buffalo Bore 380 +P 100gr lead RNFP = 1079 fps, SD 8 - very snappy, but not at all uncomfortable, probably need a stronger buffer spring, as all brass damaged at case mouth from ejection.
Win Ranger 380 95 gr JHP = 881 fps (no SD data), - pleasant to shoot
Handload: PMC 380 brass, 95 gr RN plated, settled on Accurate # 5 after experimenting
Accurate #5, Lyman starting load @3.3 gr would not cycle gun, worked up in .2 gr increments,
most accurate load, least SD:
95 gr RN plated, 4.9 gr AA#5 WARNING MAX LOAD, 0.960" COAL
chrono data: 837 fps, SD = 6 WARNING MAX LOAD per data book. Pleasant to shoot, grouped well, no pressure signs on cases.
The newest Lyman book has lower starting loads, lower max loads, lower velocities than my forty year old books. IIRC, I had to get up around 4.0 gr just to get the gun to cycle, and their current max load's velocity still did not equal either PMC or Winchester factory loads.