.223 Rem

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IMR4227 - I tried this with the 68gr BTHP, but don't recall the charge weight. (IIRC, I read that Stoner used this powder in his load for the M-16... gas system wasn't timed for DuPont's ball powder at that time.)

IMR3031 - 20.5grs under the 75gr BTHP... I saw it work in two different 1:9's and a 1:7. Book velocity about 2500fps... of course that varies between barrels.

IMR4895
IMR4064

Hornady 5th Edition and Hodgdon website.
 
H322 looks to be a good powder for the 50-55gr. Might try it with the 52 & 53 Hornady.
I have done some reading on h322 and benchmark and they both look good for the lighter bullets. 69 is the lightest I shoot and 80 is standard. Run some test lots and see what you like. The only power I have loaded in 223 I did not like was the enduron 4166 I believe. TAC is a very versatile 223 powder and I like how well it meters and usually its available when most are sold out. Trying to find varget or ar comp can be a pain so I like and use them but dont send people on the great search to find them.
 
The MVP I had shot everything well.
The most accurate load was the Berger 70gr VLD over a slightly below max load of BLC2.
On a whim, I used it to kill several deer. It worked.

Just decide on what you are going to use it for, and choose bullet accordingly.
For shooting metal plates at shorter distances, even cheap FMJ or even cast bullets will perform satisfactorily.
 
I shoot paper.
Currently have an 8 twist barrel in my 12FCV Savage bolt.
My 1:9 barrel did fine with 50 gr*** up to / including Hornady 75 BTHP Match. (*** didn't try anything below 50)
~Light~ --- Benchmark, 322, 335,
~Heavy~ ---Varget - RL15
There's also far more powders out there that will work/work well.
Just rec'd a keg each of TAC and IMR 8208 XBR.
I tried a lb of Tac before. Nothing to dislike about it. Good price, and meters extremely well. (Liked it enough to buy more, which is something I can't say about every powder I've tried)
Haven't tried 8208 XBR before, but it's hard to find anyone who dislikes it.

That's the beauty of 223, especially for ~short~ benchrest,,,, So many different combinations that work/work good, all without breaking the bank (or your shoulder!) :thumbup:
 
I'd be inclined to use the heavier bullets with a 9" twist but that's just me. A little overspin probably won't hurt with a well-made barrel but you may run into disintegration if you're pushing those lighter pills at top velocity
 
nothing aginst your bolt guns i have one my self in 223 .its my AR in 223 that amazes me . found imr4320 pushing sierra 55gr.BTHP is laping holes. makes me wonder why do i have a boltgun
 
I'd be inclined to use the heavier bullets with a 9" twist but that's just me. A little overspin probably won't hurt with a well-made barrel but you may run into disintegration if you're pushing those lighter pills at top velocity

I'm thinking 1:9 twist ought to be good.

From what I've read elsewhere, 1:7/1:8 barrels will overstabilize a bullet so it won't nose over coming in on target over a longer trajectory. If the bullet comes in like the space shuttle, it'll start doing some tricks and be less accurate. Anything out to 300yds, the trajectory is flat enough it probably won't matter, but 600-800yds seems to be another story.

nothing aginst your bolt guns i have one my self in 223 .its my AR in 223 that amazes me . found imr4320 pushing sierra 55gr.BTHP is laping holes. makes me wonder why do i have a boltgun

Well, with a crankbolt, you're not chasing brass. Unless you're using a brass catcher on your AR... then it's a moot point. Sounds like you found a good load for yours.
 
nothing aginst your bolt guns i have one my self in 223 .its my AR in 223 that amazes me . found imr4320 pushing sierra 55gr.BTHP is laping holes. makes me wonder why do i have a boltgun

So you don't have to scurry about to find your brass??

I've got 2 bolt .223s and 2 AR15s in .223 & 5.56.

Other than matches (3gun) and practice, I probably shoot my bolt guns 10xs what I do my ARs just cause I don't have to either fetch brass or strap on a brass catcher.
 
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