Need .223 load suggestions.

OK folks I have a Savage MD12 .223 it has a 24" 1-9 twist barrel. I can not get it to shoot straight with anything under 63gr bullets. But here is the rub I have a swage set up and make 22lr jackets for .224z So a 55gr is the best Not the only but the best size bullet that you can make with a 22 rimfire jacket.

Now for my question running the greenhill formula i have come up with what I hope to be the answer I need to go slower than what i published. I need to push that little guy out around 2300 to 2500 FPS Muzzle any of you have any ideas on a load in this speed range?

The reason i ask is my rifle is sub moa with 63gr if i drop down to 55 i may as well shoot my target with a shotgun.

The only bullet I have had good luck with under 63gr is the Hornady 52gr Amax. It was initially designed for the 22-250....so it likes to go fast. At 100 yards I get the same poi and tiny groups with them as I do my 69gr smk's.

I have pretty much the same rifle you do( Savage 12 w/ 1-9 twist), except mine has a 26" barrel.

If your sub 60gr bullets are on the short side, going slower might help tighten the groups up. I found that out with some 40gr Hornet bullets I did a few test loads with in my 223 pistol. Slowing them down really tightened the groups up.

The trick will be to find a powder that will occupy most of the volume in the case, produce the speeds you require and have a complete burn at the same time.

You may be right on the barrel length. its just the standard MD12 stainless varminter. still as it came from the factory.

hawcer wrote:

The trick will be to find a powder that will occupy most of the volume in the case, produce the speeds you require and have a complete burn at the same time.

LOL thats why I am here asking the questions

That is slowing them down a good bit. I loaded up some Winchester SP 55 gr with cci primers over 24.5 gr of H335 that was giving me velocities in the 2840 range. Not sure how low you could safely go with H335 but maybe start around 23 gr and see what happens?

I will try that ... What about a Cast bullet load? any one got a favorite with that grain ?

So you want a 55 grain jacketed bullet to go 2500 fps. Use 17 gr of H322 to get 2398 fps and a case that is 66 per cent full.

Details:
Modern Reloading, Second Edition, 2003, by Richard Lee. Page 225 gives 23 grains of H322 at 3106 fps. The 1 grain factor for velocity is .9578. So:

23 gr = 3106 fps
22 gr = 3106 * .9578 = 2974.9268 fps
21 gr = 2974.9268 * .9578 = 2849.38488904 fps
20 gr = 2849.38488904 * .9578 = 2729.140846722512 fps
19 gr = 2729.140846722512 * .9578 = 2613.971102990822 fps
18 gr = 2613.971102990822 * .9578 = 2503.661522444609 fps
17 gr = 2503.661522444609 * .9578 = 2398.007006197447 fps

How full will the case be? Page 222 says the Useful case capacity is 1.87cc. Page 704 says that the VMD of H322 is .07250 cc/gr
17gr * .07250 cc/gr = 1.2325 cc
1.2325 cc / 1.87 cc = 0.6590909090909091