Chairgun...sorry

[mattwhite 1,993]

This has to have been covered sooooo many times but i have done it on my phone, tablet and on windows on pc and unless im entering info wrong which i dont think i am, it says that with bis mags, im pushing 14.4 ftlb??

Now i bought these on a whim as the shop didnt have jsb heavies but they would be similar!!

Have i done something wrong fellas.

Clearly i cant use these if thats the case but thats not the issue as my 100 likes jsb exacts, its just something i dont understand and my apologies again for asking something thats probably been asked a million times !!!!!

[mattwhite 1,993]

Forgot to mention that its .177

[David.evans 5,323]

Put up your stats , and I'll check them out for you if you want , better still pm me , if it helps

Atb Dave

[villaman 9,983]

What weight did you put in and FPS ?

[villaman 9,983]

786 fps = 14.40 ft/lb with bismags weighing at 10.5gr

[mattwhite 1,993]

786 fps = 14.40 ft/lb with bismags weighing at 10.5gr

Thats probably where ive f#*×ed up....when i entered the pellet type i presumed it calculated the fps for you based on weight. Still new to chairgun!

[steg 609]

My worry at the minute matt..hence the pellet testing and the chrono post. (Aswell as the right pellet for her) Certainly don't want that combo getting sent away to be tested! Out of my league all this but ive got the bis mags at 10.65 grains. ...going to have some scales along with the chrono to check myself

 

Do suffer a touch of ocd i do...atb

[jonnie bravo 572]

Easiest way is to get a chrono then you know for sure, gives you the chance to intermittently check the power or check a string of shots, it doesn't take much more fps to go from 11.9FPE to over 12FPE

[Durham John 693]

Matt,

Just because your gun puts exacts out at 795 it doesn't mean the bus mags will be travelling at the same speed so may not be putting 14+ at the muzzle.

You really do need to chrono them to get the best figures.

[charlie caller 3,654]

Get it checked asap, it is highly unlikely that it will have gone over,although not impossible, you really need a chrono, or access to one. You will most likely find it will be spitting BMs out at around 700fps which will give you 11.5 ftlbs.

[mattwhite 1,993]

Cheers lads. Off to pick one up today

[jonnie bravo 572]

Cheers lads. Off to pick one up today

Can I just say thanks. Good to see some of the news members on the site taking on the experienced advice of others, you will wonder why you never bought one before

[villaman 9,983]

Get it checked asap, it is highly unlikely that it will have gone over,although not impossible, you really need a chrono, or access to one. You will most likely find it will be spitting BMs out at around 700fps which will give you 11.5 ftlbs.

Every single gun i tried them in , they had a job to get above 11.2 ft/lb ,unlike JSB heavies 11.7 ft/lb

[jacka 32]

did youget a chrono sorted Matt?,if not you're welcometo fetch rifleand as many different pellets aspossible and use my combro i'm over thebridge in Gwynedd