Hft500 fps

no avatar
Imp6
Posts: 1
Joined: Sat Jan 04, 2020 6:36 am

Hft500 fps

Tue Jan 14, 2020 9:19 pm

What is optimal FPS for the hft500 using Jsb exact 8.4. it's currently at 11.45 ftlbs with jsb heavies.

no avatar
Archer50
Posts: 198
Joined: Mon Jun 20, 2016 5:06 pm
Location: Perth

Re: Hft500 fps

Wed Jan 15, 2020 3:16 pm

I get the best grouping (and total peace of mind legally speaking) with Exacts around 11.2 - 11.3 ft.lb ie the low to mid 770's fps. My groups certainly open up above about 780 fps. This seems to apply to all my AA guns, and to my Steyr. With a bit of luck, given the ME with Heavies, that will be pretty much what it is running at now.

Alan

no avatar
tonyc
Posts: 363
Joined: Mon May 29, 2017 10:55 am

Re: Hft500 fps

Thu Jan 16, 2020 10:28 pm

Archer50 wrote:
Wed Jan 15, 2020 3:16 pm
I get the best grouping (and total peace of mind legally speaking) with Exacts around 11.2 - 11.3 ft.lb ie the low to mid 770's fps.
I don't have a Hft500, but same as above for my Ultimate Sporter, which gives 11.6-11.7 ft lb with JSBH (as high as I'd want to go), so I'd guess you'll be getting around 11 with 8.44gr.

no avatar
Jammy13
Posts: 40
Joined: Tue Jul 02, 2019 5:00 pm
Location: Northumberland

Re: Hft500 fps

Fri Jan 17, 2020 6:43 pm

I don't have a Hft500 but find with the 400 and 500 series rifles an increase of just over 3ftlbs from JSB 8.44gr to JSB 10.34gr.

I have tried this many times and the results are consistent. I'm sure you will be within the legal limit with the power you have set at this time.

Keith

no avatar
tonyc
Posts: 363
Joined: Mon May 29, 2017 10:55 am

Re: Hft500 fps

Fri Jan 17, 2020 9:41 pm

Jammy13 wrote:
Fri Jan 17, 2020 6:43 pm
I don't have a Hft500 but find with the 400 and 500 series rifles an increase of just over 3ftlbs from JSB 8.44gr to JSB 10.34gr.
0.3 surely?
0.4 on mine, maybe 0.5 on the longer barrelled S400 Classic.

User avatar
bgaltd
Posts: 931
Joined: Sun Feb 15, 2015 6:53 pm
Location: Somerset
Contact:

Re: Hft500 fps

Fri Jan 17, 2020 9:42 pm

Jammy13 wrote:
Fri Jan 17, 2020 6:43 pm
I don't have a Hft500 but find with the 400 and 500 series rifles an increase of just over 3ftlbs from JSB 8.44gr to JSB 10.34gr.

I have tried this many times and the results are consistent. I'm sure you will be within the legal limit with the power you have set at this time.

Keith
is that .3ftlbs Keith ?

no avatar
Jammy13
Posts: 40
Joined: Tue Jul 02, 2019 5:00 pm
Location: Northumberland

Re: Hft500 fps

Sat Jan 18, 2020 5:18 pm

Oops a typo. Lol. I did intend putting in a point.

Yes just over .3ft/lbs.

Tonyc. Thinking about it I don't think I tried the 2 weights of pellets on a classic so perhaps slightly higher as you say.

Well done to the sharp eyed members who spotted that.

Keith

Post Reply

Who is online

Users browsing this forum: pelletcaster and 9 guests