.223 Heavies

[CF Junkie]

Actually, it was.
My first load was set for a jump of 0.117 and 4 groups averaged 0.240 with the best group of 0.211 and one group I really messed up at 0.282.
I pressed my luck and tried a shorter jump of 0.081 and the 4 groups averaged 0.205 with groups of 0.167, 0.197, 0.214 and a group I messed up at 0.242.

I got overconfident and loaded two loads with jumps of 0.070 and 0.071, tempting fate with a lot less bullet in the neck.
I shot 8 groups with groups of 0.191, 0.193, 0.211, 0..212, 0.212, 0.214, 0.219 and 0.233 for an overall average of 0.211. The 0.233 was the result of barrel warming allowing the last two shots to drop a bit.
The good 7 groups averaged 0.208.

I think I can get away with about 40% of the bullet caliber in the neck.

 

[RegionRat]

For commercial bullets, those are very good stats.

You don't typically see the heavier commercial boat tails hold in the ones and low twos with the exceptions of HM folks in F-T/R and LR BR folks. Well Done!

I would stretch it out and then decide.

It might be easier to "read the tea leaves" on that seating depth question with the multiplication factor that comes from a little more time in the air.

If for example you shot that testing at 300, you may or may not see any difference, however you might decide there was something to gain and then it would still be more robust at 100 on windy days.

In any case, well done.