Hello,
question to the Expert.
What are the difference between 6,5x08 AI and 260AI?
Regards
HeinzMan
question to the Expert.
What are the difference between 6,5x08 AI and 260AI?
Regards
HeinzMan
Difference between 6,5x08 AI and 260AI?
- Thread starter heinzman357
- Start date
Depends really on the "6.5-08" part of the question. The "6.5-08 A-Square" is what became the SAAMI spec for the .260 Rem. If you're asking the question in regard to interchangeability, there is an inherent danger...
If the 6.5-08AI in question was a 6.5-08 wildcat (meaning not specifically a 6.5-08 A-Square), and was then "ackley'ed" (shoulder blown out to 40*) then the headspace datum (the shoulder) may not be the same. At best, you'll not be able to chamber 260 ammo in it...at worst, you may seperate a case head (if you rifle has a longer/taller base to shoulder measurement).
Casting the chamber is the only way to be sure...
Be safe.
If the 6.5-08AI in question was a 6.5-08 wildcat (meaning not specifically a 6.5-08 A-Square), and was then "ackley'ed" (shoulder blown out to 40*) then the headspace datum (the shoulder) may not be the same. At best, you'll not be able to chamber 260 ammo in it...at worst, you may seperate a case head (if you rifle has a longer/taller base to shoulder measurement).
Casting the chamber is the only way to be sure...
Be safe.
Some 6.5-08 AIs have very minimum body taper, check out Terry Cross's gun of the week #46.
The one I have is very straight compared to the 260 AI print I saw.
this from week#46
Improved Cases--Many Variations on a Theme
One thing I learned several years ago is that there are at least two variations of the Ackley improvement. There is the original Ackley dimensions and there is a Clymer variation that has slightly more body taper. My chamber copies the original Ackley pattern with minimum body taper. Also note that this case is very close to a .260 Ackley Improved but still not the exactly the same. I am pointing this out because I honestly believe any of these variations would work very well with the right leade and throat but since they all have slightly different case dimensions, it is very important to match your reloading dies to your exact version. Using the wrong body / bump die will over-work your cases or cause slop in the fit of a chambered round that will do nothing good for accuracy. Close is not good enough. Make sure your dies are for the exact round your barrel is chambered for. In our game, reliability is just as important as accuracy. There are no alibis in the event of a malfunction or mis-fire, so everything must work perfectly, every time. Because of this, we have always been a proponent of body sizing every round. When the correct die is properly set up, you can achieve perfect chambering and extraction while losing little or no practical accuracy. Note that our realistic accuracy goals are different than the benchrest crowd. We are wiling to give up one or two tenths to achieve reliable feeding and extraction even in a dirty rifle
One more thing, if you have someone make your custom size dies make sure they know what they are doing and that they know if it is a loose hunting chamber or a tight match chamber. IMO it is worth having Dave Kiff grind a resize reamer that matches the chamber reamer, that is the only way to get a perfect fit. Believe me I have more than a few sets of $180 dies laying around that are useless.
The one I have is very straight compared to the 260 AI print I saw.
this from week#46
Improved Cases--Many Variations on a Theme
One thing I learned several years ago is that there are at least two variations of the Ackley improvement. There is the original Ackley dimensions and there is a Clymer variation that has slightly more body taper. My chamber copies the original Ackley pattern with minimum body taper. Also note that this case is very close to a .260 Ackley Improved but still not the exactly the same. I am pointing this out because I honestly believe any of these variations would work very well with the right leade and throat but since they all have slightly different case dimensions, it is very important to match your reloading dies to your exact version. Using the wrong body / bump die will over-work your cases or cause slop in the fit of a chambered round that will do nothing good for accuracy. Close is not good enough. Make sure your dies are for the exact round your barrel is chambered for. In our game, reliability is just as important as accuracy. There are no alibis in the event of a malfunction or mis-fire, so everything must work perfectly, every time. Because of this, we have always been a proponent of body sizing every round. When the correct die is properly set up, you can achieve perfect chambering and extraction while losing little or no practical accuracy. Note that our realistic accuracy goals are different than the benchrest crowd. We are wiling to give up one or two tenths to achieve reliable feeding and extraction even in a dirty rifle
One more thing, if you have someone make your custom size dies make sure they know what they are doing and that they know if it is a loose hunting chamber or a tight match chamber. IMO it is worth having Dave Kiff grind a resize reamer that matches the chamber reamer, that is the only way to get a perfect fit. Believe me I have more than a few sets of $180 dies laying around that are useless.
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