I have a short chambered 260 rem bbl that I would like to rechamber for 6.5-06. It is an A&B that is supposed to be cut .050 short. Wondering if I would have to remove some of the bbl to clean up the chamber and if so how much?

Nope.

The taper on the 260 is less than the o6 case. You would need to remove basically the entire chamber. A 6.5-06AI would clean it up or a 264Wmag.

6.5 X .284 gets the job done. roger

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6.5 X .284 gets the job done

For some reason I always forget that option

So my curiousity got the best of me on this one.

The .308 is 0.454" dia at the end of the case body located 1.560" from the case head.

The .30-06 is 0.448" dia at this same distance from the case head. So you're 0.006" short in diameter to clean this up.

The body case taper rate on the .308 is 0.0118 in/in. So, to do a 6.5-06 with the you'd need to set the barrel back about 0.51" by my calc's. This does not consider that you are short chambered. 0.50" barrel setback is probably all you'd need.

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The .30-06 is 0.448" dia at this same distance from the case head. So you're 0.006" short in diameter to clean this up

When I get a chance I'll redraw. I measure my drawing as .4348 at 1.54 which say over an inch setback.

Conisdering that either way you go you will cut off the existing threads and have to cut new ones, it is hardly worth the effort.

I do a 6.5-06 Imp in a heartbeat. 6.5-06 "regular" is essentially a wildcat anyway.

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The .30-06 is 0.448" dia at this same distance from the case head. So you're 0.006" short in diameter to clean this up.

The body case taper rate on the .308 is 0.0118 in/in. So, to do a 6.5-06 with the you'd need to set the barrel back about 0.51"

Well I didn't take the time to redraw the entire case overlay. However just drawing a line for each case I do get .448 for an 06 case at 1.56" and somewhere around .5" setback.

Now when I get real lazy with a lot of time on my hands I'll go back and see where I F'd up the original drawing.

Even so .5" set back would look strange at best not counting thread issues.

As Muskeg said the 6.5-06AI would work like a champ.

After you build a 6.5x284 & shoot her you're going to take that rifle in your arms & ask. Where have you been all life? GAURANTEED!

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After you build a 6.5x284 & shoot her you're going to take that rifle in your arms & ask. Where have you been all life?

Doug,
My bias against the 284 case continues to show. I built a 284 on a OLD M98 almost 35 yrs ago now. Second rifle I built. For some reason every once in a while it would slide over the rebated rim and jam the nose down. Just often enough that I had no faith in it as a hunting rifle. Worked great for targets etc.

I'm sure it was something in the build (me). So based on my history I always forget the 6.5x284. But in a long action with a throat long enough to seat the bullet long the capacity of the case is just about ideal.

Not to mention quality 6.5-284 brass available as well as dies costing in the $45 range vs $145 for the 6.5-06AI

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Originally posted by ramrod340:
For some reason every once in a while it would slide over the rebated rim and jam the nose down. Just often enough that I had no faith in it as a hunting rifle. Worked great for targets etc.

Someone working for Ackley built mine in 1966. The feed was worked on and it functioned great. The feed on mine had to be worked on as it started life as a 6.5 Arasaka. Big difference in diameter. roger

I've built 6.5/284s & 284s on both VZ24 & Remy 700 action & not had any FFT issues. Yet. I do know that the issue that you mention though.

Doug I'm sure my issue was my lack of experience at the time in the build.

I seem to remember when I was talking to John Sundra about his 7mmJRS when I was designing my 280PDK me mentioned having a Ruger built in 284 that had the same type of feeding issues.

While I believe the feeding issue can happen based on the number of happy 284 owners it is either rare or easily corrected.