9.5x47R 250 grs slicks paper patched to .377. Weighing charges individually and exactly.
52 grs 1.5 fg Olde Eynsford: MV 1283 SD 13
This is a little slow for 200 yards accuracy. Definitely signs of wobble and groups, such as they are, are @ 7”
To get any more powder in would require very heavy compression, so not the route forward.
52 grs 3fffg Olde Eynsford: MV 1423 SD 30
Bullets are definitely stabilized, no sign of wobble. Groups are better but there is vertical stringing and that Standard Deviation of 30 seems unduly high.
I will try 50 grs 3 fffg next but I would welcome advice and counsel on getting the SD down.