polygonal barrel vrs smooth twist
- Thread starter aa_limited
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ST barrels only have rifling twist the last few inches towards the muzzle.
See this thread for discussion on the topic.
Different calibers and makes/models have different twist rates in traditional & polygonal rifling.
See this thread for discussion on the topic.
Different calibers and makes/models have different twist rates in traditional & polygonal rifling.
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Ummm... The polygon barrels are custom made by LW per the specs of the customer, customer in this case equal RAW, Mike N (Thomas), etc. So you would have to ask the gun makers what the twist rate is... Hint don't expect an answer. Barrel geometry is considered propitiatory information by most makers.
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I assume you use Google too, it's really not that hard to find..... You sure ask a lot of questions which are pretty common, hence that most people don't reply on your topics.
Some things you just have to try yourself, and you will find your answer
But if I recall correctly, I have read that the ST has got the slower twist.
I couldn't care less which barrel has what twist, as long it is shooting accurately.
OTOH, when turning things the opposite way, you can't really tell if a barrel will shoot a certain pellet accurate by knowing what twist rate it has got. That's a matter of experimenting, and your mileage might vary.
Air gun pellets are mainly drag stabilized, unlike bullets. That's why some ancient smooth bore diana's are still able to make decent groups, without rifling at all.
Some things you just have to try yourself, and you will find your answer
But if I recall correctly, I have read that the ST has got the slower twist.
I couldn't care less which barrel has what twist, as long it is shooting accurately.
OTOH, when turning things the opposite way, you can't really tell if a barrel will shoot a certain pellet accurate by knowing what twist rate it has got. That's a matter of experimenting, and your mileage might vary.
Air gun pellets are mainly drag stabilized, unlike bullets. That's why some ancient smooth bore diana's are still able to make decent groups, without rifling at all.
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yes im readind and reading alot. and i like t hat.
as for twist polygonal barrels are definitly slower twist than reg lw barrels and the slower twist rate allows pellets to be fired over longer ranges more accuratly because it allows u to increase pellet speed.
as for twist polygonal barrels are definitly slower twist than reg lw barrels and the slower twist rate allows pellets to be fired over longer ranges more accuratly because it allows u to increase pellet speed.
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A small number of barrel makers supply Polygonal (rifled) barrels. (not just Lothar Walther).
Only FX make the newer technology SmoothTwist rifled barrels. (they bought the Patent).
The two methods of making and the two types of resulting 'rifling' are dissimilar in many ways.
Only FX make the newer technology SmoothTwist rifled barrels. (they bought the Patent).
The two methods of making and the two types of resulting 'rifling' are dissimilar in many ways.
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Not exactly
LW poly and conventional barrels both have a 450mm twist (about 1 in 17.7")
Other twist rates can be ordered, but I highly doubt that airgun manufacturers actually do that.
Same goes for "match grade barrels". You may think what you like, but I don't buy it. Just marketing to me. There is no "match grade blank" in the LW catalog.
http://www.lothar-walther.de/163.php
(Off topic, another one, the infamous "match grade trigger". My a$$
A common 10m target rifle has a match trigger, the ones found on almost all sporter airguns don't even come close IMO.)As for your last comment goes, please explain how you come to that conclusion
My findings are that most airgun pellets have a preference to be fired at a speed of approximately 900fps (general rule of thumb) Some can be fired a little hotter from certain barrels, but most will develop a nasty wobble when shot faster.Focus on accuracy instead of speed, speed is useless when you can't hit what you're aiming for
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im seeing some raw air guns with the polygonal barrel and they said the poly is a slower twist rate than a reg lother walther barrel
and they are shooting 8.4 airarms well over 100 fps and groupls of less than an inch are common
and they are shooting 8.4 airarms well over 100 fps and groupls of less than an inch are common
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I highly doubt it, unless RAW lets LW produce barrels to RAW's specifications. (But to me, that seems not to be the case, considering that RAW is a relatively small mfr. with low output of guns)
The twist rate can easily be measured with a smooth turning cleaning rod (e.g. dewey) and a marker
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LW sells polygon barrels for anyone to order off the shelf as a stocked item.
They can supply any of their barrels with custom twist rates to manufacturers who order in volume though.
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Weatherby, yes properly prepped poly LW's in .177 DO group 8.4 at 1040fps in under one inch at 100 yards. Outside. And the 10.3 at 1,000fps even.
Gotta stay current. Remember when it was easy to find a .177 barrel to shoot a full 20fpe ? We all had then for years then ............... ugh , now a few good more barrels in tin y bore, yah!
John
Gotta stay current. Remember when it was easy to find a .177 barrel to shoot a full 20fpe ? We all had then for years then ............... ugh , now a few good more barrels in tin y bore, yah!
John
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FYI..... LW's minimum order for custom air gun barrels is quantity of 10 (Ten). I know this because I ask Woody Woodall. Easily reachable numbers by a manufacturer such as RAW.
Thurmond
Thurmond
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"weatherby"I assume you use Google too, it's really not that hard to find..... You sure ask a lot of questions which are pretty common, hence that most people don't reply on your topics.
Some things you just have to try yourself, and you will find your answer
MMMMMMM??
Interesting the question actually led me to some things that I didn't know.
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Wow, that's good to know. LW blanks are widely used and very easy to get where I live, but special orders consisting of only 10 barrels is definitely (good) news to me
I was expecting the number to be more like min. 100 barrels for special orders. But 10 is great, and is indeed certainly doable for a smaller mfr. (And maybe even for a group buy
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Apparently my reply above caused some controversy, hence the negative accuracy point.
It was definitely not my intention to bash the TS, that's why I also took the time to give an answer.
There are several smileys in my answer as well, so I may assume my real intention was perfectly clear (apparently not for everyone)
The reason why I wrote the google quote is that it had caught my attention that the TS tends to open a new thread for many relatively simple questions without trying to find an answer first (forum search or google)
IMO, if people have the ability to start a new thread, they also have the ability to check a forum archive or try to find an answer using google or another search machine.
If I sounded like a dick, I appologise. I'm always trying to help other people (check my posts, I mainly answer instead of asking) which takes a lot of my precious time, and if I'm getting negative points for trying to help, well, let's put it that that's not the best motivator....
Being Dutch, I can be very direct, but keep in mind it is never my intention to insult people.
Gijs
It was definitely not my intention to bash the TS, that's why I also took the time to give an answer.
There are several smileys in my answer as well, so I may assume my real intention was perfectly clear (apparently not for everyone)
The reason why I wrote the google quote is that it had caught my attention that the TS tends to open a new thread for many relatively simple questions without trying to find an answer first (forum search or google)
IMO, if people have the ability to start a new thread, they also have the ability to check a forum archive or try to find an answer using google or another search machine.
If I sounded like a dick, I appologise. I'm always trying to help other people (check my posts, I mainly answer instead of asking) which takes a lot of my precious time, and if I'm getting negative points for trying to help, well, let's put it that that's not the best motivator....
Being Dutch, I can be very direct, but keep in mind it is never my intention to insult people.
Gijs
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I saw on the raw site that with polygonals the jsb 8.4s are infact shooting under an inch at 100 yards well over 1000 fps.
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