New 1377 Power output?

[mrto]

Hi Guys,
            Can you tell me what power you guys in the US are getting from a new and completely standard 1377 with ten pumps,

  Thanks.

[Crosshairs]

Well it's under 600 fps that's for sure, i'm getting 505 fps from one of my stock 1377s and that's good compared to some.
                                 Mike

[ettolo]

Well it's under 600 fps that's for sure, i'm getting 505 fps from one of my stock 1377s and that's good compared to some.
                                 Mike

with 10 pumps?

[Cwlongshot]

With my '77 shooting Crosman Destroyers and only a ext probe bolt does high 500's witha peak of 589 and a low of 558 fps.



CW

[breakfastchef]

This has been my experience with newer 1377 pistols at 10 pumps. Typically I have seen 500-520 fps. I had one shoot @550 fps at 10 pumps out of the package. These velocities were using my 7.0 grain test pellets.

Well it's under 600 fps that's for sure, i'm getting 505 fps from one of my stock 1377s and that's good compared to some.
                                 Mike

[mrto]

Hi Guys,Thanks for your help    I have an old though new condition 1322 that easily is capable of the UK 6ftlb limit on air pistols and I wondered how close the 1377 may get to that limit in stock form.They seem as standard to be well short of 6ftlbs in the US and regadless imports for the UK market are knocked down even further in my experience.The 1377 has loads of potential of course and I shall buy one in the not too distant future for a little modding of course.
  Hi CW,thanks for posting the pic' and the chrony numbers you have a nice looking pistol there.

  Mark. 

[Tater]

Mine is in the low 540's, but that was measured with the android app. The fps was pretty consistent between shots.
The "power mod" is a 12" barrel.

[agninja]

It's funny because they detune those guns they send America Jr. (Canada) and Britain, like the M4177. But mine is American and it chronied at like 495, eventhough the box states 600.  So really they don't even need to detune them since the fps is already dreadfully lower than what they advertise.

[mrto]

I agree no need to detune further,but HM Customs are a hysterical bunch and I don't mean funny! 

[BDS]

530-ish fps with 8.0 g lead pellets at 8 pumps, gun is about 2 yrs old.

[Cwlongshot]

Hi Guys,Thanks for your help    I have an old though new condition 1322 that easily is capable of the UK 6ftlb limit on air pistols and I wondered how close the 1377 may get to that limit in stock form.They seem as standard to be well short of 6ftlbs in the US and regadless im :-[ports for the UK market are knocked down even further in my experience.The 1377 has loads of potential of course and I shall buy one in the not too distant future for a little modding of course.
  Hi CW,thanks for posting the pic' and the chrony numbers you have a nice looking pistol there.

  Mark.

Thank you Mark!!

I have been reading that the Canada guns had a vent hole to bleed off some pressures. I also knew the UK had a limit, but did not know where that number fell.

I was quite pleased at my numbers! Now I do have a ext Probe bolt installed for those shots. I don't know what it did for the velocity, I am positive it increased it but by how much. 5 or 10fps? I would be very surprised if it was any more than that.

I started to install the failed flat top piston and valve. From last weekend.  . Then I will chrono it again and see.

CW

[ettolo]

It's funny because they detune those guns they send America Jr. (Canada) and Britain, like the M4177. But mine is American and it chronied at like 495, eventhough the box states 600.  So really they don't even need to detune them since the fps is already dreadfully lower than what they advertise.

Funny! The blister of the one I bought here in italy say "495fps | 151mps max".
We have power limitation to 7,5j (for airguns and without a licence).
For a pellet weight of 0,53g our 1377 will go to only 6j 
Saw photo of American (?) blister wich say 600fps max and other 625fps max

[mrto]

Thank you Mark!!

I have been reading that the Canada guns had a vent hole to bleed off some pressures. I also knew the UK had a limit, but did not know where that number fell.

I was quite pleased at my numbers! Now I do have a ext Probe bolt installed for those shots. I don't know what it did for the velocity, I am positive it increased it but by how much. 5 or 10fps? I would be very surprised if it was any more than that.

I started to install the failed flat top piston and valve. From last weekend.  . Then I will chrono it again and see.

CW

Hi CW,
          Yes,the UK power limit for pistols is 6ftlbs and for rifles 12ftlbs which as far as I know makes the British Isles the only country on the planet that has two different power limits for airguns on its statute books!!That said in both pistol and rifle useful trajectories can be achieved with the use of the correct pellet and sufficient power exists for vermin shooting.We in the UK do a little better generally speaking than our Canadian cousins in terms of permissable power limits as they are restricted to a maximum of 500fps I believe in both pistol or rifle and are not governed by a muzzle energy limitation.In .25 cal the Canadians do a little better than us in the UK.
   I like the black grips and pump handle on the new 1377's as on your gun I much prefer them to the earlier brown grips etc that were fitted to this model.Good luck with your further modding by the way.

  Mark.

[Trophyhunter49]

   The only 1377 that I have that is stock(all but the polish job) is my phase II. It chronys at 579 with 10 pumps and Crosman HP 7.9 pellets 

[Cwlongshot]

Hi CW,
          Yes,the UK power limit for pistols is 6ftlbs and for rifles 12ftlbs which as far as I know makes the British Isles the only country on the planet that has two different power limits for airguns on its statute books!!That said in both pistol and rifle useful trajectories can be achieved with the use of the correct pellet and sufficient power exists for vermin shooting.We in the UK do a little better generally speaking than our Canadian cousins in terms of permissable power limits as they are restricted to a maximum of 500fps I believe in both pistol or rifle and are not governed by a muzzle energy limitation.In .25 cal the Canadians do a little better than us in the UK.
   I like the black grips and pump handle on the new 1377's as on your gun I much prefer them to the earlier brown grips etc that were fitted to this model.Good luck with your further modding by the way.

  Mark.

Thanks Mark,

Thanks for the clarifications. Sorry state regulating air guns...

CW