would a 24 inch 1760 barrel be to long for a 1377 and are they the same diamiter nt

would a 24 inch 1760 barrel be to long for a 1377 and are they the same diamiter nt

Joined: April 28th, 2007, 1:05 am

October 13th, 2007, 12:04 am #1

nt
Last edited by crs1377 on October 13th, 2007, 12:04 am, edited 1 time in total.
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Joined: May 25th, 2007, 8:59 pm

October 13th, 2007, 12:29 am #2

I'm in the process of replacing one of my 2240 with a 2260 barrel.No big modification had to be done.I think the 1377 and 1760 are compatible.It's not too long, just make sure the breech screw and rear sight screw are nice and tight. The barrel weighs more than double of the stock one.I'm not 100% on this, but i'm sure I'm right. The 1377 and 1740 use the same breech, so it should be compatible with the 1760.Good luck, post pics to see how it comes out.
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Joined: November 17th, 2006, 3:51 am

October 13th, 2007, 12:49 am #3

..works out fine. It's not the extra speed the long barrel CAN give (but it's not a promise...is a probability) but the lessened NOISE that has some attraction.
Last edited by gubb33ps on October 13th, 2007, 12:50 am, edited 1 time in total.
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Joined: May 25th, 2007, 8:59 pm

October 13th, 2007, 1:07 am #4

even if valve is left stock, changing the barrel for a longer one will increase it's fps , how much depends on any other modification.But it will increase.
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Joined: November 17th, 2006, 3:51 am

October 13th, 2007, 1:20 am #5

..from chronograph readings, have found some box.-stock guns don't gain a thing over 20" in hot weather...still testing to see if they do in cool/cold weather (of course neither length will be a fast in cool weather). So far, all the longer barrels have been noricably quieter, but not all of them have been measureably faster.

Yep... I believed long barrel ALWAYS gave higher velocity..and they do about 90% of the time...but those pesky 10 percenters refuse top do what they are supose to. Given a valve that releases enough gass, then longer barrels are faster...but some box-stock valves squirt out pretty small volumes, and the longer barrels don't seem to do much at all.

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To be fair, the ONLY figures that really count are from long barels cut back to shorter length...that's the only way to measure the SAME barrel at different lengths... it's a one-way street as you can't make the same barrel longer. Comparing different barrels brings in too many variables in bore diameter and smoothness.
Last edited by gubb33ps on October 13th, 2007, 1:25 am, edited 1 time in total.
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Joined: April 28th, 2007, 1:05 am

October 13th, 2007, 1:35 am #6

..works out fine. It's not the extra speed the long barrel CAN give (but it's not a promise...is a probability) but the lessened NOISE that has some attraction.
what kind of mods did you do and what fps are u getting out of the 1377 also if you know what fpe im most interested in hunting and some times plinking little copper targets thanks for the info
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Joined: May 25th, 2007, 8:59 pm

October 13th, 2007, 1:36 am #7

..from chronograph readings, have found some box.-stock guns don't gain a thing over 20" in hot weather...still testing to see if they do in cool/cold weather (of course neither length will be a fast in cool weather). So far, all the longer barrels have been noricably quieter, but not all of them have been measureably faster.

Yep... I believed long barrel ALWAYS gave higher velocity..and they do about 90% of the time...but those pesky 10 percenters refuse top do what they are supose to. Given a valve that releases enough gass, then longer barrels are faster...but some box-stock valves squirt out pretty small volumes, and the longer barrels don't seem to do much at all.

-----
To be fair, the ONLY figures that really count are from long barels cut back to shorter length...that's the only way to measure the SAME barrel at different lengths... it's a one-way street as you can't make the same barrel longer. Comparing different barrels brings in too many variables in bore diameter and smoothness.
I have received higher fps with longer barrel replacments, but all have had modded valves.A stock gun such as a 1377 might get higher fps with a barrel say 14 to 18 inches. Any longer and you might need a modded valve or flat top piston to achieve any benefits. Good point.
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Joined: March 26th, 2005, 2:17 pm

October 13th, 2007, 10:00 am #8

what kind of mods did you do and what fps are u getting out of the 1377 also if you know what fpe im most interested in hunting and some times plinking little copper targets thanks for the info
My carbine has an 18 inch barrel and I use Crosman Diopter sights for target shooting. I refer to it as my "Mini-Match". On 4 pumps it's almost silent.

4 pumps is right on at 10 meters and it's a tack driver. 8 pumps puts me into the bull at 25 meters without any adjustment. Wasn't planned that way but it sure worked out nicely. Aluminum piston, trigger and valve mods.

Steve.

"Sticks and stones may break my bones but names will devastate my inner child forever"
- Carlos Mancia - (out of context)



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