1377 Smooth twist Barrel Mod?
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1377 Smooth twist Barrel Mod?
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Topic: 1377 Smooth twist Barrel Mod? (Read 3798 times))
CajunHoss87
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1377 Smooth twist Barrel Mod?
«
on:
March 11, 2012, 07:50:00 AM »
Hi Everyone! Has anyone every made a crosman 1377/ 2240 smooth twist style barrel? I was thinking the crosman 760 smooth bore barrel could be made into one. Sounds like a nice mod for crosman owners seeing as it has been around since 1885 when Holland & Holland introduced the "paradox gun." The FX barrels sport them and they are same hole accurate at 20 yds! Some of the features that are superior to rifled barrels are 1) self cleaning, 2) higher B.C. exiting pellet 3) higher fps/ efficiency dues to decreased coefficient of friction in barrel, and 4) less pellet picky. SO....... anyone know anything about putting one of these in a 1377 or modding for one? I know it is inconceivable to buy one from FX as they would be VERY expensive and/or unobtainable. ~Justin
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one_shot
Sharp Shooter
Posts: 865
Re: 1377 Smooth twist Barrel Mod?
«
Reply #1 on:
March 11, 2012, 07:27:56 PM »
so your wanting to convert to a 760 pumper.
id pickup a $25 walmart 760 and experiment.
i dont know of any direct fits smooth bore.
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Louisiana
bobster
Marksman
Posts: 400
Re: 1377 Smooth twist Barrel Mod?
«
Reply #2 on:
March 11, 2012, 07:32:16 PM »
Quote from: CajunHoss87 on March 11, 2012, 07:50:00 AM
...The FX barrels sport them and they are same hole accurate at 20 yds! ...
The available 10" Lothar Walther barrel from Crosman is already same hole accurate at 20 yards, on the 2300 anyway.
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CajunHoss87
Guest
Re: 1377 Smooth twist Barrel Mod?
«
Reply #3 on:
March 11, 2012, 10:29:59 PM »
Yeah One_shot I thought about that!
I'm tempted but I don't have the tools or knowledge "yet" to make the last 2 inches or so compressed. I am still looking into it though.
Bobster, I have heard of the amazing accuracy of the LW barrels. However, they are $100 and they still lack the benefits of a smooth twist style barrel. Increased fps, self cleaning, and higher B.C. for squirrel hunting. Thanks for the advice though. Also, I want a 24 incher for my sniper 1377. I just want the perfect little pumper so I can take each shot with pride and maybe hand it down and say "this is what I built, now its yours" lol I am a perfectionist in many regards I know...
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Brewerja
0811 Field Artillery. The Kings Of Battle.
Sharp Shooter
Posts: 555
Marine Corps Artillery. FIRE MISSION!!
Real Name: Justin
Re: 1377 Smooth twist Barrel Mod?
«
Reply #4 on:
March 12, 2012, 01:57:39 AM »
How does the ST barrel effect the ballistic coefficient? I thought the bc was effected by pellet shape, pellet weight and pellet speed...? I dont understand how a barrel would make a pellet retain more energy or retain energy longer. I would have to say the the ballistic coefficients would suffer if anything, through squeezing out a higher muzzle velocity. The same pellet, moving faster, has to fight against the atmosphere (drag/air resistance) to retain its velocity and energy. Im not sure dude, but cost to performance, i would say stick with what we all know works well. Perhaps someone can correct me on the ST barrel increasing BC? Im interested if its true.
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Oceanside, CA
1983 Webley tempest .22 (original)
1377c 22 conversion
90's era IZH-60, metal reciever version.
.22 cal Marauder w/ light mods.
one_shot
Sharp Shooter
Posts: 865
Re: 1377 Smooth twist Barrel Mod?
«
Reply #5 on:
March 12, 2012, 02:02:49 AM »
1 thing i can say for sure.
when i installed the hammerli 177 barrel on my 760....my groups tightened up,fps increased a little.
but the 760 has a straight smooth bore,things fit loose in it.
just saying.
im not sure the mod was worth it.
about as accurate as my 1077 now.
but im interested in learning.
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Louisiana
Bryan Heimann
GTA Senior Contributor
Posts: 6043
Re: 1377 Smooth twist Barrel Mod?
«
Reply #6 on:
March 12, 2012, 02:06:04 AM »
Pellets definitely have different ballistic coefficients out of different barrels. The way the rifling cuts/damages the pellets, the way the choke slightly changes the diameter, etc. effect ballistic coefficients and it is noticeable, plus the smoothness of the bore can have an effect. All those little variables can effect pellets quite a bit.
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Knob Noster, MO
regularguy11B/ regular guy/ laid over
QVTom
GTA Senior Contributor
Posts: 3695
Real Name: Tom
Re: 1377 Smooth twist Barrel Mod?
«
Reply #7 on:
March 12, 2012, 02:34:57 AM »
Smooth twist barrels are available from AOA for $220.
Makes the LW a bargain at half the price for a blank.
http://www.airgunsofarizona.com/FXBarrelBlank.html
«
Last Edit: March 12, 2012, 02:46:47 AM by QVTom
»
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Acton, CA
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1377 Smooth twist Barrel Mod?