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Ideal 300 yard caliber?

Sraw

My local range goes out to 300 yards and is where I do 99% of my shooting so I'd like to build a rifle tailored to that. I've been shooting a 223 AR15 I built for "precision" a couple years ago and recently have been wanting to upgrade (and an excuse to buy/build another gun).

My rifle, when I do my part, can fairly consistently shoot moa and better with reloads. I'd like to beat that but I'm not trying to break any records.

So I have done a bunch of research and would like some advise from those of you more knowledgeable then I.

While cost isn't really a huge concern I'd like to keep efficiency in mind, this is just a toy. I don't want an extreme barrel burner. I'd also prefer to avoid overly complicated brass prep. If I have to fire form I'd want those loads to be accurate. If I go bolt gun it will be a remage type prefit set up. I'm not looking for bench rest, more like f class/local matches

Option One:

Build another AR upper to go on the lower I already have.

Calibers that I'm considering are:

6.5 Grendel, only problem is there isn't a lot of "precision" info out there for it. It is the least expensive option.

And:

6mm ar/ar turbo 40, seems to be the best choice in an ar. Turbo has extra brass prep.

My other option is to buy a 700, RPR, HMR, etc. Custom action is out.

The calibers that have my interest are the following:

6.5 creedmoor, not too exciting but factory match rifles are available and precision recoding components are readily available. This along with the 6mm creedmoor are the next least expensive.

6mm creedmoor, probably the hardest on barrels from what ive read.

6x47 or 6.5x47 Lapua, seem to be more liked than the creedmoor but there isn't a lot of post lapua creedmoor brass info out there to see if that was the main difference. No factory rifles.

6mm BR, easy and accurate. Savage factory rifles, only single shot.

6mm Dasher, probably overkill for what I'm looking for. Also can't really be beat... Though no factory rifles and more brass prep.

Feel free to suggest other options but I don't want to order a blank or reamer.

I know this is kind of long but thanks to those who have made it this far and thanks in advance for your input.
 
IMO it would be hard to beat a Tikka in 6.5 Creedmoor for what your wanting to do. They make several versions, short barrel and 24 inch barrels and the price tag is a 1,000 or less, unless you go with Tac model.

I’m more a fan of the 6.5x47 but you killed that. The Creedmoor and the 47 are so close it’s really a non issue. You also have some nice brass available for the Creedmoor now, Lapua and I really like Peterson.

Your gonna get a bunch of opinions on this, hopefully you get one that helps you make the decision.
 
the single shot Savage 6BR with a 36X Weaver scope is probably the best shooting 300 yard setup you can get for your money out of the box,

my custom 6BR with the Leupold 40x LCS will shoot 1/2" 5 shot groups at 300 yards,,

I think you can get better bullets in 6mm than 6.5,,at least actually get them,,there are very good 6.5 bullets made but sometimes you cant get them,,
 
Ok,I'll be the odd man. The 6.5x47 was designed for 300 M. And hammers at that range.
I have a 6br that shoots in The low teens at 200. But tbe 47 will do everything you want it. to. Would be my choice.
 
While I agree with the above comments on the 6BR and it's inherent accuracy, given the current difficulty finding brass (or reasonably priced brass), I would recommend a different route.
The .223 (for which you already have brass/ammo) or .260/7mm-08/.308 (readily available components) which are all proven and accurate cartridges. You're only shooting 300 yards, any of those 4 exceed your requirements and all do it at a low cost and high fun factor with money to spare.
 
smoooth said:
While I agree with the above comments on the 6BR and it's inherent accuracy, given the current difficulty finding brass (or reasonably priced brass), I would recommend a different route.
The .223 (for which you already have brass/ammo) or .260/7mm-08/.308 (readily available components) which are all proven and accurate cartridges. You're only shooting 300 yards, any of those 4 exceed your requirements and all do it at a low cost and high fun factor with money to spare.
Click to expand...

6br Brass should be available in March.
 
"6x47 or 6.5x47 Lapua, seem to be more liked than the creedmoor but there isn't a lot of post lapua creedmoor brass info out there to see if that was the main difference. No factory rifles."

This is untrue somewhat. No one has been able to show proof that Lapuas Creedmoor brass makes it shoot better and the 6.5x47 still is supreme on the firing line in accuracy for the 6.5s.

It seams that the 6BR or the 6.5x47 is what you need based on your criteria.
 
We shoot a “varmint match” in the winter at 300 yards at a local club.

The guy with all the records is shooting a 1:10 straight 6 BR shooting 90 grain Berger target boat tails pushed with H4895 powder.

I’ve had great luck with a similar setup, but using 30.7 grains of Varget. The bullet was seated 10 thou into the lands.

The 6 BRA, as mentioned, would be great. A heavier bullet would be good, but not as much of a payoff as ar longer ranges.

I’d avoid a factory setup. You just aren’t going to end up being happy.

A custom barrel, properly set up, a good pillar bedding job, a good trigger, the proper bullet, and a solid bipod/rest and rear bag setup are good to be a recipe for long, happy shooting happiness.
 
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