Leaving out .308 and 6.5 Creedmore as obvious candidates.
That’s a loaded question
I only load 3 calibers 308 300blk and precision .223. If you want to save money and be as accurate as possible you have to customize any loading to the gun. Save money be more accurate and expand your ballistics knowledge.
Nobody can accurately predict pricing and availability. But guessing...
308 Win and 6.5 Creedmoor should be around for some time.
223 Remy, of course. And I do mean 223 and not 5.56, for they're not in the same accuracy league.
In an AR15 platform, 6 ARC is likely the accuracy leader. However, the cartridge was introduced during the wrong part of the COVID curve, and doesn't have extensive use in the field. 6.5 Grendel is a good cartridge, although the case is a little short on boiler room to push its 123 grain high-BC bullets. 224 Valkyrie is a long shot, as it seems to perform better in bolt actions than ARs. From what I hear, 224 Valkyrie performs best for the handloaders who are willing to experiment with loads.
Continuing with AR15...
6.8 SPC and 300 blackout really aren't precision chamberings. 22 Nosler hasn't lived up to expectations. Larger bores aren't precision cartridges.
If a company ever produces reasonably priced match ammo on one of the 6BR-based cartridges, then jump on this like white on rice.
There are good chamberings based on the 308 case, or ones of similar powder capacity.
- If an ammo company other than Lapua would have jumped on 6.5x47 or 6x47 ammo, then Hornady's Creedmoor likely would have been a short-lived flop.
- 260 Remy is a possibility, especially with a faster-twist barrel and a good chamber.
- 6 Creedmoor has a strong chance of being around for a long time. 243 Win might have had a chance, but Creedmoor has a better chamber and barrel for precision bullets.
- 7mm-08 isn't precision chambering. Nor are the larger bore cartridges based on the 308 case.
There are definitely calibers more energetic than 308 that are precision calibers. But magnums are generally pretty expensive.
- 6.5 PRC might be an option, but it needs better bullets than what Hornady offers.
- 300 PRC is definitely a precision long distance cartridge. Don't expect reasonable prices.
- 300 WM can be a long-ish distance sorta-precision cartridge. Probably not reasonably priced.
- Too bad Hornady didn't back 7 SAUM. As with 6BR, backed by the right ammo company, this could be a great long-ish distance cartridge.
Factory ammo requirements definitely limit the chambering options. Start with a great barrel, a solid action, and the right chamber -- with a little testing across loads, factory ammo can be very accurate. Not national-record bench rest accurate, but accurate enough for all but the most demanding shooters. I'm fortunate enough to have some very accurate rifles, all of which strut their stuff with factory ammo. I've shown what a few of these rifles can over the years in the "Long Range Rifle Discussion" thread.
I'm thinking .223 Rem in a decent bolt action would be prudent for many reasons.This message has been edited. Last edited by: RichardC,
I like mine. Defiance action, Proof carbon-wrapped barrel, Grayboe stock & bottom metal, Trigger Tech trigger, Accurate Mags. See how it did on page 136 of the Long Range thread.
223 bolt action
With a nice barrel and a properly cut chamber, I definitely have options for accurate factory ammo.
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