I have Lyman data using 358311 and 358156 bullets with Bullseye. Some charges range up to 7.0 grs Bullseye (36.5k cup)…which seems high to me. Lyman uses CCI 550 magnum primers in all their 357 Mag loads including Bullseye. I also now use CCI 550 in all my 357 Mag loads even mid range (my rationale: the faster burning powders take up less space in that long cartridge and I want to ensure a consistent burn with them by using magnum primers.)
Does anyone have actual Bullseye 357 Mag Mid Range chronograph data? I’m looking for a load at approximately 1,000 fps with 155-160 gr SWCs using Bullseye.
For 38 Spl +P I have Lyman data which allows use of 4.0 grs Bullseye with 155-160 gr bullets…that’s another load development. Seems like a good standard +P load (4.0 grs BE/158 gr SWC).