Going under minimum


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Captain FU
February 14, 2010, 11:12 PM
More new-guy questions!

I just loaded my first 15 .223 rounds. Hodgdon H335 shows 24gr as the starting load with 50gr bullets. I loaded 5 at the given start charge, and 5 at .5gr under and over that given start charge.

The 23.5gr shot better than the others.

My question is do I dare go any further under the start charge seeking better results or is a lighter/heavier bullet the way to go?

50gr Nosler
H335
CCI 400 primers
Winchester brass

Ruger M77 MKII 1:12 rifling.

Thanks again

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Sunray
February 14, 2010, 11:24 PM
Loading under minimum is just as dangerous as loading over max. Causes weird pressures. The powder can actually detonate as opposed to burning. Mind you, a half grain under won't detonate. However, don't work down. Work up in half grain increments to the max load.
Ruger's site shows a Mk II .223 as having 1 in 9 rifling. Your's an older rifle? 1 in 9 is good for heavy bullets. 55 grains and up.

Captain FU
February 14, 2010, 11:28 PM
I would have sworn it was 1:12.

I quick check with the cleaning rod is in order.

It is a 1:12

Sunray
February 14, 2010, 11:40 PM
It might well be. I just had a look at their site. Says 1 in 9 for all their .223 bolt action rifles. Not a big deal either way. The faster twist does let you use heavy bullets. Better for long range shooting.
Depends on what you're using your rifle for. A varmint won't care what bullet weight kills it. Bit different for target shooting.

Captain FU
February 14, 2010, 11:55 PM
I am trying to reload for targets

Sunray
February 15, 2010, 12:11 AM
77 grain Sierra Matchkings or 75 grain Hornady A-Max bullets, if you're loading for match shooting. Neither will be cheap. Any like bullet weight bullet will do for fun target shooting. Match bullets do make a difference though. Pick a bullet and do this.
Beginning with the starting load given in your manual, load 4 rounds only(mag capacity). Go up by half a grain of powder, loading 4 of each keeping them separate until you get to the max load in your manual.
Then go shooting. Shoot at 100 yards, for group only, slowly and deliberately off a bench.
Change targets between strings of 4 and allow time for the barrel to cool.
When you find the best group, sight in.

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