Long Range
Well-known member
Tony K Harper on HOF pisteidenkin valossa USA.n menestynein pistepiekkari ampuja.Menestyksensä vuodet ampui pääosin Bill Calfeen rakentamilla piekkareilla.
Muutti muutama vuosi sitten "vuoristoon" ja rakensi harrastuksekseen asepajan koneineen.Hänellä myös ampumarata kotipihassa,jossa ampuu lähes päivittäin ja testailee rakentamiaan piekkareita.
Tausta tiedot sepitykseen imetty Calfeelta ja Tonyn piekkarin rakennustaidot "kohahduttivat" piekkari maailmaa kun hänen rakentama piekkari kulkeutui Pedro Serralheirolle.Pedro voitti sillä Maailmanmestaruuden ja ampunut huimia tuloksia.
Asiakkaita Tonylle olisi jonoksi asti,mutta rakentelee vain muutamia piekkareita / vuosi ja pääosin vain testailee asioita koti radallaan.
Kopioin tähän alle Tonyn kirjoituksen kalvaimista ja piipuista.Hommasimme mekin Suomeen noita suorareunaisia 0.2250/0.2255 olakkeettomia Calfee kalvaimia ja niillä on syntynyt käyviä pesiä.
Laitan perään brutaalin google käännöksen.Alan ihmisille tuo aukeaa:
What .22LR Reamer & Barrel?
The reamer: When it boils down to it there is only so many ways to design the reamer and many designs have had success. First you have the leade angle. That can be anything, but today it seems 1.5 to 5 degrees is the range most often used.
I own both, 1.5 and 2.0 degree, and if they weren't marked, I could not tell them apart. Both can work and there may be a time to use one vs the other based on the actual size of the bore of the barrel. Whomever is doing the barrel work will make that decision based on personal experience. If that decision will show up in actual scores is another debate.
Back to design. The .22LR was designed with a tapered case. So, reamers are made for that taper. But there are also straight sided reamers that do not taper, and they are actually more popular today than the original tapered designs.
There are reamers with fixed stops that will only allow the reamer to go so deep and reamers with no stop that will allow the machinist to go to whatever depth he chooses.
There are reamers that use different style cutters. One of which is a spiral cut reamer which I prefer.
Finally, some reamers have fixed pilots and others with live pilots that can be changed to fit different size bores. The most popular are the live pilots.
There is one big problem with the .22 LR cartridge that drives which of the reamer styles are best for the job. That problem is the inconsistence of the round., from round to round, from lot to lot, and from manufacturer to manufacturer. Longer round, longer hole. Can't have fixed stop.
There is also one big problem with the barrels we use. It is the same problem; the bores are not always the same from manufacturer to manufacturer or even from the same manufacturer. Smaller hole, smaller pilot. can't have fixed pilot.
The reamer must be capable of adapting to the actual size of the round and the actual size of the barrel.
The reamer must have live pilots and no stop.
With all this said, the two most popular reamers used are 1.5 -2.0-degree leade, straight sided, reamers with live pilots, and no stop. People that use the 1.5 degree leade tend to use very little engraving on the bullet. The 2.0 degree crowd normally use much more engraving.
A popular thing you hear is "I engrave up to the second driving band." That statement drives me crazy. The person that said it believes he did just what he said. The problem is if he had kept inserting rounds in his chamber, he would have found the rounds vary so much some would engrave up to the second driving band and others would have engrave through the second driving band.
I believe this explains at least partly of why some lots shoot well in certain barrels but not so good in others.
Good news for anyone still reading. I'm going to stop here. Depending on how this is received I'll do barrels later.
Yes, I know I haven't even mentioned boring or grinding chambers.
I'm back. Before going to barrels let me finish up with chambers.
Chambers can be bored, and they can be ground. I have a friend that worked in the machine shop at Westinghouse. He had access to some of the finest machine tools available on the planet. Luckily, he also had an interest in .22LR rimfires. He bored some chambers, and he ground some chambers, his conclusion was, there were little to be gained by using these methods vs using reamers.
I actually watched him bore a chamber and I thought there were too many ways to screw it up for me to do it that way, so I use reamers.
Now on to barrels:
Most of our barrel makers have shown they can produce excellent barrels, winning barrels, but the most popular currently are Shilen, Muller, and Benchmark. There are others such as Lilja, and a host of centerfire barrel makers. But these are the most popular and have to most winning records.
One big controversy about barrels for rimfire is about button rifled vs cut rifle barrels. Cut rifled barrels dominates centerfire but not rimfire. I will not go into the different arguments, but I can ask you to look the current rimfire records and you can see for yourself the barrels that are winning.
Then we have the rifling patterns. The Shilen rachet is considered a minimally invasive pattern (MI). What this means is the rifling does not cut very deep into the bullet or at least not as deep as normally grooved barrel. With the rachet pattern (one side cut at a slant rather than at 90 degrees it is supposed to buck the wind better. The Muller 4 MI is an even more MI rifling pattern and is also said to buck the wind. I'm not going to go into all the different rifling options, or I'll never finish this.
Shooting MI rifling patterns is a little different than shooting the old style 4 groove barrels or the new Muller 8 grooves. Now some will tell me I'm crazy, and I may be, but I shoot nearly every day and have done so for many years. But this is what I think.
A MI barrel will hold point of aim and if the wind gets up just a little but enough to see it on the flags it may continue to hold point of aim. As the wind progresses you will reach a point that the MI can't hold point of aim and the bullet will move with the wind. That break point can be a killer. If you shoot only MI barrels and you learn that point you can do really well, plus if you miss a small change in the wind the MI can save you. But it does take some getting used to.
Non MI barrels are more linear meaning the bullet strike moves with every change in the wind.
These are just my beliefs and may be worth no more than what you paid for them.
In summary, you need a straight sided 1.5 or 2.0 degree leade, live pilot reamer without a stop. If you choose the 2.0 degree, you will want more engraving.
If you choose an MI barrel you may want to stick with MI barrels and not try alternating between MI and normal rifling patterns.
The great thing is you have options.
TKH
Muutti muutama vuosi sitten "vuoristoon" ja rakensi harrastuksekseen asepajan koneineen.Hänellä myös ampumarata kotipihassa,jossa ampuu lähes päivittäin ja testailee rakentamiaan piekkareita.
Tausta tiedot sepitykseen imetty Calfeelta ja Tonyn piekkarin rakennustaidot "kohahduttivat" piekkari maailmaa kun hänen rakentama piekkari kulkeutui Pedro Serralheirolle.Pedro voitti sillä Maailmanmestaruuden ja ampunut huimia tuloksia.
Asiakkaita Tonylle olisi jonoksi asti,mutta rakentelee vain muutamia piekkareita / vuosi ja pääosin vain testailee asioita koti radallaan.
Kopioin tähän alle Tonyn kirjoituksen kalvaimista ja piipuista.Hommasimme mekin Suomeen noita suorareunaisia 0.2250/0.2255 olakkeettomia Calfee kalvaimia ja niillä on syntynyt käyviä pesiä.
Laitan perään brutaalin google käännöksen.Alan ihmisille tuo aukeaa:
What .22LR Reamer & Barrel?
The reamer: When it boils down to it there is only so many ways to design the reamer and many designs have had success. First you have the leade angle. That can be anything, but today it seems 1.5 to 5 degrees is the range most often used.
I own both, 1.5 and 2.0 degree, and if they weren't marked, I could not tell them apart. Both can work and there may be a time to use one vs the other based on the actual size of the bore of the barrel. Whomever is doing the barrel work will make that decision based on personal experience. If that decision will show up in actual scores is another debate.
Back to design. The .22LR was designed with a tapered case. So, reamers are made for that taper. But there are also straight sided reamers that do not taper, and they are actually more popular today than the original tapered designs.
There are reamers with fixed stops that will only allow the reamer to go so deep and reamers with no stop that will allow the machinist to go to whatever depth he chooses.
There are reamers that use different style cutters. One of which is a spiral cut reamer which I prefer.
Finally, some reamers have fixed pilots and others with live pilots that can be changed to fit different size bores. The most popular are the live pilots.
There is one big problem with the .22 LR cartridge that drives which of the reamer styles are best for the job. That problem is the inconsistence of the round., from round to round, from lot to lot, and from manufacturer to manufacturer. Longer round, longer hole. Can't have fixed stop.
There is also one big problem with the barrels we use. It is the same problem; the bores are not always the same from manufacturer to manufacturer or even from the same manufacturer. Smaller hole, smaller pilot. can't have fixed pilot.
The reamer must be capable of adapting to the actual size of the round and the actual size of the barrel.
The reamer must have live pilots and no stop.
With all this said, the two most popular reamers used are 1.5 -2.0-degree leade, straight sided, reamers with live pilots, and no stop. People that use the 1.5 degree leade tend to use very little engraving on the bullet. The 2.0 degree crowd normally use much more engraving.
A popular thing you hear is "I engrave up to the second driving band." That statement drives me crazy. The person that said it believes he did just what he said. The problem is if he had kept inserting rounds in his chamber, he would have found the rounds vary so much some would engrave up to the second driving band and others would have engrave through the second driving band.
I believe this explains at least partly of why some lots shoot well in certain barrels but not so good in others.
Good news for anyone still reading. I'm going to stop here. Depending on how this is received I'll do barrels later.
Yes, I know I haven't even mentioned boring or grinding chambers.
I'm back. Before going to barrels let me finish up with chambers.
Chambers can be bored, and they can be ground. I have a friend that worked in the machine shop at Westinghouse. He had access to some of the finest machine tools available on the planet. Luckily, he also had an interest in .22LR rimfires. He bored some chambers, and he ground some chambers, his conclusion was, there were little to be gained by using these methods vs using reamers.
I actually watched him bore a chamber and I thought there were too many ways to screw it up for me to do it that way, so I use reamers.
Now on to barrels:
Most of our barrel makers have shown they can produce excellent barrels, winning barrels, but the most popular currently are Shilen, Muller, and Benchmark. There are others such as Lilja, and a host of centerfire barrel makers. But these are the most popular and have to most winning records.
One big controversy about barrels for rimfire is about button rifled vs cut rifle barrels. Cut rifled barrels dominates centerfire but not rimfire. I will not go into the different arguments, but I can ask you to look the current rimfire records and you can see for yourself the barrels that are winning.
Then we have the rifling patterns. The Shilen rachet is considered a minimally invasive pattern (MI). What this means is the rifling does not cut very deep into the bullet or at least not as deep as normally grooved barrel. With the rachet pattern (one side cut at a slant rather than at 90 degrees it is supposed to buck the wind better. The Muller 4 MI is an even more MI rifling pattern and is also said to buck the wind. I'm not going to go into all the different rifling options, or I'll never finish this.
Shooting MI rifling patterns is a little different than shooting the old style 4 groove barrels or the new Muller 8 grooves. Now some will tell me I'm crazy, and I may be, but I shoot nearly every day and have done so for many years. But this is what I think.
A MI barrel will hold point of aim and if the wind gets up just a little but enough to see it on the flags it may continue to hold point of aim. As the wind progresses you will reach a point that the MI can't hold point of aim and the bullet will move with the wind. That break point can be a killer. If you shoot only MI barrels and you learn that point you can do really well, plus if you miss a small change in the wind the MI can save you. But it does take some getting used to.
Non MI barrels are more linear meaning the bullet strike moves with every change in the wind.
These are just my beliefs and may be worth no more than what you paid for them.
In summary, you need a straight sided 1.5 or 2.0 degree leade, live pilot reamer without a stop. If you choose the 2.0 degree, you will want more engraving.
If you choose an MI barrel you may want to stick with MI barrels and not try alternating between MI and normal rifling patterns.
The great thing is you have options.
TKH
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