Compression and Olde Eynsford

[SgtDog0311]

Thanks Gentlemen. Done a range spread over 10 gr in half-grain increments and found accuracy along several points, the best being at 1200fps. Took that out to get 385 meter sight settings and started rethinking my load at that velocity. My barrel is a 16 twist. That's how's come I'm asking. Guess if there are not general rules-of-thumb I'll just keep working up and see where the next couple accuracy loads are. Shouldn't be too hard to add a 100fps based on where I ended up. Appreciate the comments.