HW100KT power adjustment

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tom_ke888

Post subject: HW100KT power adjustment

Posted: Wed Sep 29, 2021 4:27 pm

Joined: Sun Jul 01, 2018 10:37 pm
Posts: 911
Location: Guelph, Ontario

Hi, I had been shooting my 22 cal HW100KT for a while. It was tuned from non-PAL to 12 fpe. Shooting 13.43gr JSB RS at 625 fps and getting 80 shots per 200 bar fill.

For FT use, I think perhaps more power and flatter trajectory would be preferred.

I added about 1/2 turn on the regulator adjustment screw (estimated to be at 95-100 bar). Then adjusted hammer spring tighter. Here is the result: I am now getting 674 fps with the 13.43gr JSB RS. Shot count at 60 shots met my goal of 4X14 Shot mags.

674 fps was chosen based on plateau of 710 fps less 5%. This was taught to me by Hobbyman to give the best efficiency at a given regulator setting.

POI appears to consistent. I am happy with the result.

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Rob27

Post subject: Re: HW100KT power adjustment

Posted: Wed Sep 29, 2021 5:47 pm

Joined: Wed May 12, 2021 8:34 am
Posts: 507
Location: Just north of Toronto

Interesting. If you truncate the decimal values you only have 5 or 6 numbers over the whole string of shots. I do not know much about regulators but that looks very consistent to me.
It does not waver over a range but lands on one of a limited number of values.

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Daryl

Post subject: Re: HW100KT power adjustment

Posted: Wed Sep 29, 2021 6:16 pm

Joined: Wed Jan 05, 2011 12:35 pm
Posts: 11348
Location: P.G. B.C.

Counting only to shot 59, your spread is only 12fps.
I would suggest that is quite good. If the last shot
that increased the spread another 7fps did not change
the POI within your normal use range, then could 60 shots
yes.

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Daryl

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tom_ke888

Post subject: Re: HW100KT power adjustment

Posted: Wed Sep 29, 2021 6:35 pm

Joined: Sun Jul 01, 2018 10:37 pm
Posts: 911
Location: Guelph, Ontario

Daryl wrote:

There was also a 662 (shot 23).[emoji24]
Yes, POI remain the same at my 50ft range, actually. All I want is to get 4 mags of 14 shots each. During an FT match I will fill up half way. So the shot count is OK.

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tom_ke888

Post subject: Re: HW100KT power adjustment

Posted: Wed Sep 29, 2021 7:07 pm

Joined: Sun Jul 01, 2018 10:37 pm
Posts: 911
Location: Guelph, Ontario

Rob27 wrote:

The proof will need to be real world. I do think it is consistent enough for my purpose.

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