Help needed with power level

[simon77]

I am completely confused

Decided to check my HW100 over the combro this evening to make sure all was OK.

I put some penetrators through (9.5gr) and found the power to be going a touch over 12 Ft/Lb

PANIC

Put some Bis Mags through (10.6gr) power fell to about 11.6 Lb/Ft

Put some Barracudas through (10.35gr) power drops below 11 Ft/Lb

My usual pellet - accupel (7.9gr) is getting power of around 11.6Ft/Lb

BUt AA feilds (8.44 gr) are putting me over the limit again 12.18 Lb/Ft.


So.......power is OK with heaviest and lightest pellets but is going over with mid-weight pellets

Can anyone please help explain this also any advice would be good but I guess the gun is going to have to go away to be tuned down a bit.

Cheers,
Si

[99CLOMP]

that does not make sence ALLWAYS check your gun on the sweet spot

[simon77]

I have found the gun to be pretty consistent throughout its usable fill pressure. The gauge on the front is indicating 130 BAR so should be OK

[Raygun]

Apart from the weight of the pellet it will also depend on the pellets efficiency.
Another thing that can alter power is the pellet fit in the barrel.

You should test with a variety of pellets for these reasons.

ATB
Ray.

[99CLOMP]

how many pellets of each type did you use did you do the test with one fill?

[simon77]

how many pellets of each type did you use did you do the test with one fill?

Not a lot. About 5 of each. Didn't bother doing more as it only takes 1 over the limit to cause you trouble...also was in a bit of a flap

[steven]

Whether it makes sense or not is immaterial. The fact remains that it is capable of running hot!
I’m afraid, to keep on the right side of the law, and to be sure of staying on the right side of the prison wall, you need to get it backed-off a little.

[Fluffybuck]

From experimenting with my HW100's, I have theorised that they have slighty tight barrels, which particularly suit the loose-ish Crosman pellets and the soft-ish AA/JSB clones (easily mould to barrel).
The Bismags, which are a tight fitting pellet, don't give any higher reading because they drag too much on the barrel. I find the Bismag accuracy to be very, very poor from my HW's - and my HW's give Bismags a poor ballistic coefficient as well.

HTH
Fluffy


edited to mention that Bismags/Baracuda's seem OK in my S410's, although I don't use them much.

[Dragonboy]

Are all the pellets diameters the same?

[steven]

Are all the pellets diameters the same?

No.

The .22's are larger than the .177 pellets.

[99CLOMP]

can I suggest you take more time with your tests,these are my results with a H 100 BISmag 4.51 705fps 11.70ftlbs logun 9.5 730 11.24 daystate 4.52 775 11.25 mosquito express 7.9 4.52 795 11.08 as you can see the heavy ones give the the most power good luck ANT

[simon77]

Are all the pellets diameters the same?

Brand to bran I think not but couldn't tell you by how much.

Cheers

[kgb]

pm m8

[Dragonboy]

No.

The .22's are larger than the .177 pellets.

Ha Ha!

[Fluffybuck]

My Bismags have a head size about 0.05mm bigger and a skirt size about 0.15mm bigger than my Accy's.

HTH