Rules question--barrel taper

bryan

bryan

Bryan Armatys
The rule book states, essentially this: 1.250 diameter max from 5 inches ahead of the bolt face and not greater than would be defined by a straight taper from that point to .900 at the muzzle @ 29 inches. By my calculations, that is .01458" per inch taper....or a legal diameter at the muzzle of 1.00206 at 22".
Do the math and let me know if I'm wrong.
Now, If that barrel cylinder was 1.200 instead of 1.250 for the first 5 inches, Would the legal muzzle diameter now be .9875" at 22 inch length?
How about 1.060 cylinder.......would the 22" length legal muzzle diameter be .9466?
No, I'm not getting confused with tenon diameter. I need to know max diameter at the muzzle for a Savage.:eek:
Bryan

For that matter, have you guys used smaller diameter barrels with any success?
 
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Bryan,
I think that you are making this too complicated. Think of the maximum as a container that your barrel has to fit within. Anything that fits in the container is legal.
 
bryan ...

Right below the picture of the barrel on the Varmint Rifle Diagram, lower right hand corner, are the words: A Shorter Barrel Than 29" May Have PROPORTIONATELY Larger Muzzle Diameter. I think that says it all. The key word of course is PROPORTIONATELY. Proportionately is different than just fitting within a container.

Give the guys at Krieger Barrels a call at 262-255-9593. I'm sure they have all the numbers charted for a quick response to your calculations and any questions you may have. Art
 
May have proportionally larger muzzle diameter is still the largest diameter that is allowed at that point on the diameter of the barrel. Anything smaller is still legal to use so long as it isn't larger in diameter at any point on the barrel than what is prescribed in the rule. You could have a 1" straight with no taper barrel as long as the barrel isn't long enough the muzzle gets outside of where the 1" diameter on the taper of the maximum HV taper would be. I agree with Boyd in that anything that fits within what would effectively be the container is legal.
 
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If it is not the same, pray tell, what DOES it mean? I would say that anything that can be cut from a max legal barrel is legal. Putting it another way, if one started with a barrel that is the exact size, in all respects, as the maximum allowed in the rule book, put it in a lathe and removed metal, including cutting it to any legal length, it would be legal. BTW, before I gave my answer, I did the math. If one assumes a length of 29" from the bolt face, and subtracts 5", and then subtracts .9 from 1.25, and then divides the answer by 24 ( the remaining barrel length after subtraction 5 from 29) we are left with a rate of taper of .01458" per inch. Multiplying that rate times 17 will give you the muzzle diameter that is proportionally larger for the shorter barrel length of .22". It is 1.0021 (rounded up from 1.00208") How would you figure it?
 
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Barrel taper

From what I have seen, the Savage "Bull" taper is legal. Thread diameter is 1.060 and tapers (if you want to call it a taper) to 1.00 at 26". That fits in the envelope of the rules.
I'd just hate to show up with a Savage and a such tapered barrel at 22 inches and get thrown out for having an illegal advantage, so to speak.
Bryan
 
As I read the rule the "container" is constant and if the barrel will fit in the "container" it is legal. Why would the size of the "container" change?? Read the part again about "Not Exceed".

Mike Swartz
 
Brian,
The Savage barrel that is 1" at 26" is not legal. At 26" the maximum muzzle diameter would be .944".

Abintx,

I disagree. Your assertion that proportionality requires shorter barrel to be smaller at both ends would require a reduction in cylindrical section diameter and the tapered section to be reduced along its entire length if a barrel is shortened, assuming it was at max to begin with. This is not done, nor is it required as the rules have been interpreted for many years. If you buy a max heavy blank, as long as the 1.250 shank diameter does not extend more than 5" in front of the bolt face, you can cut it off any way that you want from either end (maintaining a minimum 18" length), and turn what is left down however much you like.
 
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Mike, Boyd ...

You're right !!! I reread it. The word larger didn't register at first. Old age I guess. As long as it fits in the container, it's OK! I got it. Art
 
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