While going through my ammo stock and cleaning it up I noticed this. About 15 years ago I loaded 4 boxes of 44 Mag. 240gr cast SWC with 17gr Blue Dot. At the time my data said 18.5 was max, now Lyman list 15.5 as max. Did they make the powder hotter or the data more conservative or was the 18.5 a typo?
My question is what do I do with it ? I hate to have to pull all 200 rds. Any comment, other than don’t load more than you shoot, would be appreciated.