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  #1  
Old 18th October 2016, 08:19 PM
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Default BFTA power rule

After speaking to ft shooters i was told the bfta limits power to 11.5ftlbs.
After reading the rules myself it states the the pellet speed must be 5fps under 12ftlbs and not 5ftlbs below 12ftlbs(11.5ftlbs).

Therefore using a 8.44gn pellet, 12ftlbs power output equals a pellet speed of 800fps.
795fps (BFTA rule, 5fps below legal limit) is a power output of 11.85ftlbs

So the limit is 11.85ftlbs not 11.5ftlbs as i was told.

Is this correct?

What ftlbs do you shoot at?
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Old 18th October 2016, 08:27 PM
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Power is not the holly grail !!!!!! Far better have your rig set at 11.1 /11.2 you will not loose much if any trajectory and may gain in accuracy as the rifle could be smoother to shoot.
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Old 18th October 2016, 08:33 PM
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Originally Posted by Lavant_Lad View Post
Power is not the holly grail !!!!!! Far better have your rig set at 11.1 /11.2 you will not loose much if any trajectory and may gain in accuracy as the rifle could be smoother to shoot.
Will different pellets respond differently to a higher velocity?

For example will express pellets group better at higher speeds?

As anyone done a experiment to compare group sizes?
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Old 18th October 2016, 08:38 PM
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Hi Tom, Yes that is correct 795fps using 8.44 AA Pellets is the limit for BFTA rules, so it is as you say 11.85ftlbs, understandably to allow some tolerance and ensure all rifles are shooting within the 12ftlbs legal limit.

I have an EV2 running at 780, TX200 at 770. Don't think there is any advantage consistency wise in a few extra fps, but could be wrong In fact shooting at a lower fps may suit the rifle better
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Old 19th October 2016, 07:09 PM
cwprice cwprice is offline
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Default bfta rules

Hi Tom
You need to chrono your rifle with what ever pellets you are going to use. In a tin of pellets stated as 8.44 on the tin, some will be below the stated weight and some will be above the stated weight. If you lube your pellets make sure you chrono your rifle after lubing the pellets as this does give a rise in velocity. I find adjusting the velocity to 785 fps keeps you well in the allowed power band for 8.44 pellets. Some say the magic fps is 777fps. The BFTA rules have as far as I am aware always stated 5 fps under 12ftlb limit.
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Old 19th October 2016, 08:41 PM
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Quote:
Originally Posted by Tomh View Post
Will different pellets respond differently to a higher velocity?

For example will express pellets group better at higher speeds?

As anyone done a experiment to compare group sizes?
Best groups I've had were running Express at 795fps.

I shoot Exacts at 765-770fps, not because of group size it's just I like how my gun shoots. Different rifle combinations will each have their sweet spot.
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Old 19th October 2016, 09:26 PM
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Quote:
Originally Posted by Tomh View Post
After speaking to ft shooters i was told the bfta limits power to 11.5ftlbs.
After reading the rules myself it states the the pellet speed must be 5fps under 12ftlbs and not 5ftlbs below 12ftlbs(11.5ftlbs).

Therefore using a 8.44gn pellet, 12ftlbs power output equals a pellet speed of 800fps.
795fps (BFTA rule, 5fps below legal limit) is a power output of 11.85ftlbs

So the limit is 11.85ftlbs not 11.5ftlbs as i was told.

Is this correct?

What ftlbs do you shoot at?
it is the velocity of the pellet not the ft/lb figure. 5 FPS below legal limit for your chosen pellet.
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Old 19th October 2016, 10:20 PM
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Brilliant

Thanks for all the advice guys

Everyday is a school day!
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Old 21st October 2016, 03:54 PM
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Quote:
Originally Posted by Tomh View Post
Will different pellets respond differently to a higher velocity?

For example will express pellets group better at higher speeds?

As anyone done a experiment to compare group sizes?
In theory each pellet/barrel/action combination will have a sweet spot in terms of group size at a slightly different velocity. In practice I've heard far more people say dropping the velocity 10 fps has improved group size than the opposite. Within reason: I don't know many people who shoot FT at 9 ft.lbs.
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