Have you tried other powders though for those bullets?
For powder in .223 I've used:
-Varget
- N135
- N530
- Reloder 12
- Reloader 15
- ww748
- IMR 4895
- H4895
- Benchmark
- TAC
- AA2520
- H322
- H335
- WC735
- BLC-2
- 2230
I've used pretty much every bullet from Sierra, Hornady, Berger and Speer in the range of 50 to 90 grains in combinations with the above powders and available primers. Not just shooting them at 100m, but out to and including 800m - in all types of weather from +30 to -15.
I've no doubt you are getting accurate loads, but I bet you could get more velocity out of them with a different powder.
Velocity is a nice to know for come-ups and if one is hunting, but it really is an aside to a good load.
I'll take an accurate load that works from summer through winter, at all distances I'm going to shoot it at before I ever care about gaining 50-100 fps.
Also, at 24 grains, are you compressed?
Depends on how the powder packs up in the case upon powder drop.
Using a drop tube will help give it a bit of velocity going into the case, whereby the powder will pack in a bit better.
Also depends on the load - a 68gr. hornady and a 77smk will often give a bit of a crunching sound - but this is typically due to the fact the large kernels are just packing up a bit more compact in the case, and not necessarily compressing.
Loads with varget and other extruded powders do better by filling the case.
I don't compress loads - I'll switch to a different load combo before I go there.
Also, about crimping, I wouldn't bother unless you notice you are having bullets moving around. Next time at the range, chamber a round and eject it, and pocket it. Do it to three or four and take them home and compare them to the original measurement (measure those four before you go and Mark them). Then fire a couple rounds and save the last one or two from the mag, do that twice, and take them home too. If they moved around then put as light a crimp on as you can possibly do and have no movement.
I've done extensive testing with crimped and no-crimped loads. Crimping if done right, can offer no degradation to accuracy and a whole lot of benefits to non-crimped loads.
Crimping is never good for accuracy.
False. Check it out for yourself.