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Post by dannoboone on Jul 24, 2011 12:48:46 GMT -5
Order a custom CF barrel, and the manufacturer will measure the
I.D.'s at both ends and make sure the smaller diameter is at the
crown, for better accuracy.
That's what I got with the PN barrel for the 10MLII for shooting
with sabots. The bullet is very hard to start, but gets a little easier
with every inch until seated. Given the loads it likes (FAST), it is
scary accurate. Wish a couple of my CF's were as accurate.
Now I'm toying with the idea of shooting sabotless in a Rem 700ML
conversion, using the Brux barrel through sinarms. Devin said that
if Brux knows a barrel is to be for a muzzle loader, they will make
certain both end I.D.'s of the barrel are of the same diameter, in
the event one wants to shoot conicals or sabotless.
For those of you who shoot sabotless accurately, how are your
barrels set up on the I.D.?
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Post by Dave W on Jul 24, 2011 14:35:17 GMT -5
According to Shilen, their barrels are kept to .0003 end to end.
I shoot mostly slip fit bullets, meaning no knurling. Once a bullet is started if I am swabbing between shots, the resistance feels very uniform all the way to the bottom. Shooting dirty, there is some uneven resistance throughout the sequence.
Never been able to accurately check the ID diameter but a Parker BE fits with no bullet alteration or sizing. With my calipers they run approximately .4505 which is the same as a sized 250 SST run through my die, as close as I can measure anyway.
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Post by GMB54-120 on Jul 24, 2011 15:00:13 GMT -5
Wouldn't a tight veggie, Nitro wad and/or a felt wad help "swab" the fouling down when shooting sabotless? The "45cal" veggies i use are very tight and should help push fouling and any powder grains down before loading a sabotless load.
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Post by Jon on Jul 24, 2011 18:37:29 GMT -5
My PN barrel which I use a full form die with is slightly tighter at the muzzle end. It will be some weeks till it is ready to go to the range only then can I give a better answer on accuracy. My PN 45 barrel is also slightly tighter at the muzzle with sabots I have to literally pound it the first couple of in.. Then It loads normal the rest of the way. My Silen 45 is consistent all the way down. Both the 45's shoot equally as well.
Jon
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Post by cuda on Jul 27, 2011 7:28:16 GMT -5
dannoboone did you find out any more about any more on the barrel ID? Just wondering what the Brux barrel measures from end to end. This could help new builds to get the best out of them. If you are spend the money for a good barrel it is nice to know. That way you will know how it should shoot before you buy it. A smooth even fit all of the way should be the best shooters.
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Post by Deleted on Jul 27, 2011 7:50:06 GMT -5
Pacnor's barrels come lapped and if you want more you order the super match grade which is hand-lapped even more. By lapping are they actually opening up the inner barrel and both ends of the barrel are staying "tight" ? How many here have had the super match lapping done and have better results than the standard match barrels?
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Post by edge on Jul 27, 2011 8:15:34 GMT -5
Actually when they lap the barrel they attempt to make it 100% uniform from end to end. Since it can never be "perfect", if they air gage the barrel diameter they will designate the "small end" as the muzzle. The difference is normally only 0.0001 or 0.0002 of an inch.
Now the starting barrel blank will be bell-mouthed on both ends where the lap comes out and new compound is added.
The breech can normally be ignored since a chamber or breechplug is added which cuts out the oversize condition.
The muzzle needs to be cut off and generally an allowance of 2 inches is enough to remove this and leave a uniform bore from end to end.
edge.
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Post by Deleted on Jul 27, 2011 10:07:03 GMT -5
HillBill and I have been discussing this and onhis "boat anchor "
gun which is a pacnor 26" super match its tight at the muzzle ,looser in the middle and tightens back up at the breech similar to what Jon's gun. It is a sub moa shooter.
Which is better ? Every barrel is different ,you would think that a uniform diameter barrel would be the best but,who's to say?
Interesting thread
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Post by Jon on Jul 27, 2011 13:41:26 GMT -5
my barrel was ordered for a two in. drop which I got. But it is still slightly tight at the muzzle end.
Jon
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Post by lwh723 on Jul 27, 2011 15:42:07 GMT -5
Did any of you ever read Bill Calfee (SP?) article on .22 rimfire barrel slugging in Precision Shooting? I think it was published in around the 2004 timeframe. He has a very detailed/thorough method for evaluating barrels. I think a lot of it would translate very well to MZ shooting.
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Post by Richard on Jul 27, 2011 16:47:31 GMT -5
Yes....................He is kind of "Kookey" "man" but he knows his S _ _ t when it comes to sluggin' a barrel to get the best point for the crown ;D I miss his writings!
I don't think its really a big deal if you are shooting saboted, but sabot less, I would prefer the bore to be even from one end to the other.
Richard
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Post by lwh723 on Jul 28, 2011 7:23:18 GMT -5
Yes....................He is kind of "Kookey" "man" but he knows his S _ _ t when it comes to sluggin' a barrel to get the best point for the crown ;D I miss his writings! I don't think its really a big deal if you are shooting saboted, but sabot less, I would prefer the bore to be even from one end to the other. Richard Somebody gave me a 1/2 dozen issues of PS from around the 04-05 timeframe. I've really enjoyed reading them. Sorry to hear he's no longer writing. I need to get a subscription. Hope the quality is still the same today as it was back in 04-05. I can read through an american hunter issue in about 15 minutes, but a PS issue keeps me busy for several hours.  |
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Post by Richard on Jul 28, 2011 10:19:33 GMT -5
PS is as good as always! I don't know that Bill Calfee has stopped writing, there just has not been any other articles published? There is still a lot of great information in the publication. From time to time I have put appropriate articles on this forum but probably most, do not concern or are of interest, to the hunting oriented member. Someone interested in harvesting a deer at 100 or 200 yards for meat and sport, don't necessarily need or to know or cares what makes things "tick?"..........just so it does what its supposed to do ;D The magazine is more geared toward the technical end of the accuracy equation. Anyone interested in obtaining a copy of Precision Shooting can call the Manchester CT. office at: 860-645-8776 and request a complimentary copy of the magazine . The subscription runs $37.00/year USA $70.00 for two years. The columnists are not like those in the "shoot and bang" magazines. These writers do get paid for an article if published, but tend to be just notable shooters, gunsmiths, tinkerers etc. They are accomplished shooters from various shooting disciplines (Tactical, across the course, .22 rim fire etc.) who have an expertise in a particular area and just feel compelled to write/share the information. Not everyone has an article in every issue as opposed to someone like Lane Simpson from Shooting Times...usually one or two articles every month and he tests what industry sends him...........and rarely has anything really bad to say about the item?  Richard |
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Post by lwh723 on Jul 28, 2011 14:48:53 GMT -5
PS is as good as always! I don't know that Bill Calfee has stopped writing, there just has not been any other articles published? There is still a lot of great information in the publication. From time to time I have put appropriate articles on this forum but probably most, do not concern or are of interest, to the hunting oriented member. Someone interested in harvesting a deer at 100 or 200 yards for meat and sport, don't necessarily need or to know or cares what makes things "tick?"..........just so it does what its supposed to do ;D The magazine is more geared toward the technical end of the accuracy equation. Anyone interested in obtaining a copy of Precision Shooting can call the Manchester CT. office at: 860-645-8776 and request a complimentary copy of the magazine . The subscription runs $37.00/year USA $70.00 for two years. The columnists are not like those in the "shoot and bang" magazines. These writers do get paid for an article if published, but tend to be just notable shooters, gunsmiths, tinkerers etc. They are accomplished shooters from various shooting disciplines (Tactical, across the course, .22 rim fire etc.) who have an expertise in a particular area and just feel compelled to write/share the information. Not everyone has an article in every issue as opposed to someone like Lane Simpson from Shooting Times...usually one or two articles every month and he tests what industry sends him...........and rarely has anything really bad to say about the item? Richard Oh yeah, and I saw your picture in one of them too. |
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Post by rangeball on Jul 28, 2011 15:05:22 GMT -5
PS is great reading.
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