13xx, max power/fps

storsy · January 15, 2012, 06:05:39 PM

I was just wondering,

storsy · January 17, 2012, 12:22:07 AM

Please delete, due to the underwhelming response.

Noah · January 17, 2012, 01:00:25 AM

Nah, no need to delete. This is what I had a few weeks ago. Hardly scientific but it'll do for now:

Hey Everybody!

Just a quick post to report the performance results for six of my pistolas:

1377: 791 fps, 7.23 fpe w/ 5.2 grain lead-free pellet, 15 pumps
1322: 566 fps, 10.67 fpe w/ 14.66 grain lead pellets, 15 pumps
1325: 458 fps, 9.43 fpe w/ 20.06 grain lead pellets, 15 pumps
2250: 595 fps, 11.53 fpe w/ 14.66 grain lead pellets
2540: 528 fps, 12.43 fpe w/ 20.06 grain lead pellets
600: 0 fps, 0 fpe w/ 14.66 grain lead pellets because it IS STILL BROKEN!!!

Overall good fun on the range. I was surprised the Co2 guns did so well despite it being as cold as 20F degrees

Take care everybody and see you around,

Noah

storsy · January 17, 2012, 09:32:53 AM

Thanks mate,
Exactly what i was looking for, some achievable numbers before i begin modding my 1377, I've never tried doing one before.

NorthStaR · January 17, 2012, 01:50:02 PM

Nice numbers Noah.

JMJinNC · January 17, 2012, 02:50:51 PM

FWIW, I'm getting 9.1 Ft-lb out of my PC77 carbine, 695 fps on a 8.44gr JSB Exact, 10 pumps.

I've gotten about 735-740 fps at 12 pumps (10 ft-lb?), any more I start retaining air. I usually target shoot and do pest control (10 to 30 yards) at 10 pumps.

JMJ

Edited- updated info.

storsy · January 17, 2012, 05:09:32 PM

Thanks for the replies folks.
If i can get to a consistant 650 to 700 fps or so, i will be happy with that.
Steel breech and flat top piston for starters, then i'll see how i get on from there.
If stopping power becomes an issue, i can for a to .22 barrel.
Thanks again.

Bentong · January 17, 2012, 06:10:32 PM

My choice of sniping at nutters digging in my backyard are my crosman 1740 (bulked co2) and my modified 1377. Lately i've been using my 1377 for the task. I use predator polymag .177 and never had issue with stopping power within 25 yrds in my property. I only go for head shot or no shot. I only use 10 pumps for 707 fps with the polymag. The highest I pump her for 20 pumps yielded 828.7 fps.

NorthStaR · January 17, 2012, 06:25:28 PM

My FT 13XX is 11FPE (actually a little more but that's an even number) with 10 pumps in .22 CAL.

storsy · January 17, 2012, 08:02:29 PM

NorthStar,
Does 11fpe, mean 11ft/lbs energy?
My old airsporter only done just over 12.

Cross Pistol Packer · January 17, 2012, 08:52:58 PM

My 1389 is putting out 11.6ftlbs with 20pumps .177 cal
Yep 11fpe is 11ftlbs energy...

storsy · January 17, 2012, 09:04:07 PM

Wow,
Those figures are amazing.
I think i may enjoy tinkering with my 1377 even more than i thought, lol.
God help the magpies and tree-rats, if i get near those numbers.

NorthStaR · January 17, 2012, 09:56:58 PM

Apart from being .22 the only other thing that I did (power wise) that isn't on your list is a 20inch barrel.

Here's my thread:
http://www.crosman-air-pistol-owners-forum.com/board/index.php?topic=4380.msg42977#msg42977

For this:

storsy · January 17, 2012, 10:07:52 PM

Cracking looking gun mate, like it.

cdoyle · January 18, 2012, 03:17:05 AM

The best I have done so far with the stock length barrel and 7.9gr CPL:
10 pumps 626 fps, 6.88 fpe.
15 = 716
20 = 774
25 = 804
30 = 854
This one has a higher than stock volume valve body and a teflon pump piston. It is somewhat anemic below 10 pumps.

Charles

13xx, max power/fps

cdoyle