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a good Long Range non barrel burn caliber

 
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  #1  
Old 11-05-2013, 11:19 AM
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a good Long Range non barrel burn caliber

As the title says, I would like some advice on a long range 1000 yard cartridge that does not burn out the barrel.

I have 3 bolt guns.a win 70 300 win mag I bought in 1986 that has a THIN bbl, and shoot 150's at 1 moa and the 168-185 burger at 7-8 moa (not .7 or ,8) or 8 inches at 100.

I've been toying around at 600-800 yards going for 1000. Hit a 8 inch steel plate at 800 with my M77 25-06 and 115 going 3200 fps. Problem is it's not consistent like it was, it's a 20 year old gun and has a good 1500 rounds through it. it used to consistently shoot 1/2 moa or better. but I get flyers more often than not now a days.

My Sav 204 is fairly new and plenty accurate. shoots 1/2 moa all the time, and lots of 1/4 moa and less if I do my part.. but the wind past 500 kills those little 39 grain bullets. so it's out

So I'm left with
My Armilite Ar-10 shoots mostly 1.5 moa except the 175 SMK's that print 1/2 and 3/4 moa. It has a hvy 24 in bbl and 308's barrels do last forever.
It is fun to shoot, but hard on brass and not as pin point as the new bolt guns

Thinking of a re-barrel or another action.

a long range bolt gun that can reach out, buck the wind and is not hard on the throat of the bbl.

close to ..67-.70 bc and 2800 fps and last past 2000-2500 rnds and be accurate


the 6.5-284 is good, but hear it burns out after 800-1000 rounds. (No wonder my 25-06 barrel is going south) the 7 mags also I hear are hard on barrels.

The 260 Rem I hear plenty good things about. launching low .6 bc bullets at 2800 fps. the 6.5x55 Sweede another.

I'm looking at the high .6 bc bullets, 6.5 Matrix 160 (.680-700 bc), .277 Matrix 175 at .680 Bc, .284 Berger 180 Hybrid at .674 BC. and 30 cal Berger OTM
215 (695 bc and 230 at .743 bc

I'm not sure the 260 rem can launch the 160's past 2500-2600 fps, the Sweede might fair better. The strait 284 shooting the 180s at 2800 fps, the 270 wsm I'm not sure how hard it is on barrels, the 270 would be nice but magazine length with the VLD's might be a prob.

a 277x284 might be a good choice.
Then we have the 30 cals. a 300 win mag could get the 215's at 2900 fps and 230's at 2700 fps from 27-28 in tubes

I have come down to these

284 win

(can have in long action and seat bullets out far. shoot .674 bc 180's at 2800 fps)

260 rem .680 bc 160 at 2550-2650 fps prob last 3500 rounds
even the .618 bc 140 VLD at 2800 fps is hands down much better than a 308 shooting .496 bc 175's at 2600 fps I'm shooting with now.


6.5x55 Sweed (or improved), 160's at 2600-2700 fps

270 wsm with 175 Matrix at 2900 fps (not sure how long throat will last)

300 win mag 215 at 2900 or 230 at 2700 fps and .696 and .743 bc (with a brake)

any ideas to calibers you all would chose?

thanks
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Old 11-05-2013, 12:53 PM
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Re: a good Long Range non barrel burn caliber

7mm-08, 6.5/ 6 Creedmoor, 6.5x47 Lapua, 6 Dasher, 270 Winchester
I will add though, to maintain good barrel life, you will have to sacrifice speed vs barrel life. Slow and steady wins the race in long range sometimes.
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Old 11-05-2013, 01:12 PM
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Re: a good Long Range non barrel burn caliber

6.5x47 lapua or 7mm saum
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Old 11-05-2013, 01:24 PM
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Re: a good Long Range non barrel burn caliber

Saw a vid where the instructor was discussing cleaning of the LR rifle. He had 11000 rounds in is 300WM.

If it took you 20 years to shoot 1500 rounds I wonder if it matters that much. If you are planning to shoot a lot more then I can see this being an issue.

On another note, flyers and groups etc are not always a indicator of a bad throat. In my experience, even just recently, I had to change to reloading SOP to address an accuracy issue. Just a thought, not sure what all you have done to look into it.
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Old 11-05-2013, 02:50 PM
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Re: a good Long Range non barrel burn caliber

6.5 Creedmoor gets my vote. Love the cartidge. 7mm/08 wouldn't be a bad choice either but you don't have as much B.C. as the 6.5mm.
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Old 11-05-2013, 03:09 PM
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Re: a good Long Range non barrel burn caliber

Quote:
Originally Posted by BrentM View Post
Saw a vid where the instructor was discussing cleaning of the LR rifle. He had 11000 rounds in is 300WM.

If it took you 20 years to shoot 1500 rounds I wonder if it matters that much. If you are planning to shoot a lot more then I can see this being an issue.

On another note, flyers and groups etc are not always a indicator of a bad throat. In my experience, even just recently, I had to change to reloading SOP to address an accuracy issue. Just a thought, not sure what all you have done to look into it.
Thanks Brent
It probably took me 20 years to shoot 1500-1600 rnds through my 25-06. I've tried many things, it shoots many 1/2 inch groups, but poi changes as I shoot, depending on bullet, the 90's shoot 1st to 10 shots in the same area, then slowly shift to maybe 1 inch lower at 200 yards , the 115's need a fouler shot, then the 2nd to 10 or so shots are fine.

as it get dirty or fouled groups shifts more as it get dirty.. by 20 round it stop shifting but accuracy is crap, 1 moa at 100 yards, 7 inches at 400 yards etc and 12-14 inches at 600 yards.. clean it good and I'm 2.00 inches at 400 yards . I notice more and more flyers as it gets older..


I've been playing with it to shoot out at 600 or 1000 yards. and practicing and developing loads etc take many rounds.. I've put through maybe 400 rounds in the last few months
It is my main coyote rig, and once I re-barrel it, I'm not going to burn it out pinking steel at 800-100 yards. anymore my personal limit for a shot on a coyote would be 600 yards.

I'm not sure about the 10,000 round 300 WM, with enough cleaning I'm sure it shoots ok, 3 moa?? but throat erosion is from the inside chamber escaping in barrel, no cleaning can stop this.

I've heard many people cleaim they shoot out their 6.5x284's in 800 rounds.
Meaning, yes they will still shoot, but not with consistent accuracy (10 shots into 3/4 moa at 1000 yards etc) anymore. The 25-06 is even more overbore than the 6.5-284, as the 06 case holds slightly more powder, and .25 is smaller than .26.
I plan to shoot 400-500 rounds a year, so 800 rounds is only 2 years for the great 6.5x284.
I'm not sure how long most 300 Wm's barrels last, it is not that terribly overbore. the worst would be a 257 STW.

I hear 284's last on average 2500 rounds or more, can get 2800-3000 fps from a 180.

thanks
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Old 11-05-2013, 03:34 PM
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Re: a good Long Range non barrel burn caliber

Mil spec for the m40 used to be 10000 rounds for 1moa or less. This instructor was well under that. I believe it took 45 rounds after complete copper removal to get back to .5moa.

I have the 6.5-284 with about 800 rounds down the tube on a stock savage SS fluted varmint barrel. I have been playing with a bore scope and talked to a trusted smith today about errosion. I will take it to him to look at as well but we discussed what I saw in the bore scope and he thinks it is fine. I do too actually. It still shoots well enough. I have no clue how long it will last though. This is my first one and I have had for about 9 months. I am going out Friday to shoot LR with a friend and see how it does. Been shooting .5MOA out to 1300 if I do my part.


I do think peace of mind is nice to have and the 7mm/.284 seems to give that good blend of performance and durability. Probably the right way to go.

Last edited by BrentM; 11-05-2013 at 04:44 PM.
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