Posted 16 August 2009 - 09:09 PM
Posted 16 August 2009 - 09:38 PM
Which is why at the beginning of chronoing at national shoots there was a jig at the front to align the barrel/rifle to the chrono.
Posted 16 August 2009 - 10:21 PM
I was just pointing out a reason why people are maybe getting slighty different readings than there norm
there is a need for a chrono just as holly stated
Posted 16 August 2009 - 10:44 PM
maybe this jig needs to be re-evaluated ?
Or thier needs to be a designated BFTA official at the chrono at all times to do the testing ?
Or maybe a completly mobile 'dark room' for the chrono to live in which will be a controlled enviroment ?( back of a van/promo vehicle)
Just my(and some others today at sdftc) idea's.
As we all know, the BFTA are damned if they do and damned if they don't.
Posted 17 August 2009 - 08:38 AM
I know your not having a dig
has you know that in FT the types of rifle and stocks are vast with different diameter air tubes and some stocks leave little or no air tube . So getting the pellet to shoot in the same path through the chrono for each competitor is alsmost impossible
Posted 17 August 2009 - 08:47 AM
The jigs are made out of softwood timber and a handful of screws. I doubt they would cost a fiver even if you went out to buy the wood because you didn't have any offcuts to use up.
I'm sure I've posted this pic before http://i214.photobuc...P1000288low.jpg
You can see the vee blocks that carry the SKAN, the vees that carry the reservoir, the square notch cut out for a stripper or muzzle brake, and the blast screen that doubles up to prevent the chrono from being shot.
Posted 17 August 2009 - 06:32 PM
This will always be an issue that is brought upto the the BFTA. Maybe a new set up rig would be a good idea. If any of you lads have an idea that will improve the system, then the BFTA would be more thaan happy to listen to what you think.
As for GP8, we did try to make sure that the chrono was under cover, the PM the sunlight did come directly down onto the chrono. But out of 79 shooters only a few were told they were over the limit? If it was a constant problem then more would have been removed from the line? I like to keep my guns well under the limit to make sure they go through every time.
The highest I have ever gone through on the chrono is 789 and that was at Iceni, earlier this year. That day was boiling and that was under a gazebo all day. The weather does play a big factor in the readings on the chrono, we have known that for years. But the fact of asking are they needed of course they are. If there were no chronos at the GP's then who knows what people would be running at. Then the Insurance we pay through the clubs would be void. Which Im sure everyone would be happy about wouldnt they.
If people set up their kit right maybe keeping it to 20-25 feet under when they check, they know they will never be over. If you go over the chrono by 30-40 feet over then you know you would have been close in the first place, so taking risks like that is that persons own fault in my opinion.
Thats me having my say.
Berty over and out haahaa
Posted 17 August 2009 - 07:22 PM
Posted 17 August 2009 - 08:12 PM
Posted 17 August 2009 - 08:44 PM
I started on lane 21 so only shot 10 targets before facing the chrono again during shoot ant 1st shot was 824fps! Luckily 2nd shot was 819fps so was ok to continue.
No idea if that was chronograph inconsistency or a light pellet, but sometimes you try to do right thing and it just don't happen.
Posted 17 August 2009 - 08:50 PM
Let me ask a simple question. Please justify why you are confident that the chrono will only be out by a small amount. And now here are two more questions: if there are two chronos that read differently, which one do you trust, and why?
Before anyone kicks off, remember I have clearly stated I am in favour of all measures to prevent cheating and that includes reliable checks with a chrono that actually have some value.
Posted 17 August 2009 - 10:34 PM
What do you call too close? As said before i know of people running at least 25ft/sec faster set on same chrono and still passing the BFTA one, thats what you call fair.
Have seen the chrono several times give readings in the region of 844 with a multitude of guns and locations. Its not a case of setting 25 to 30 ft/sec under, need to be 70 ft/sec+ under BFTA limit due to being legislated with a dodgy chrono and testing procedure taken as gospel.
Posted 17 August 2009 - 10:57 PM
mine read 784 with jsb
shot pm and chrono read 788
i set mine at 780
still shot like an -bottom- though
Posted 18 August 2009 - 12:06 AM
And thats my point, were those who were "over" actually over or was the chrono in direct sunlight giving false readings??
For my gun to register 835 (which would be about 845 on our club chrono when set up for 810) and then 819, i cant help but think the chrono reading was "faulty" due to the sun.
God knows if i had been shooting at 835 i would not have needed to come off the plate for wind
Anyway, hopefully at gp9 the sun wont be out!
Posted 18 August 2009 - 09:11 AM
on the gp 8 chrono
i think that chronos are a must but if the are not accurate then that aint no good
i know we can set our guns at lower power .but are we not fixing the wrong problem
it aint that hard to put the chrono in a enlosed tent to avoid direct sunlight
Posted 18 August 2009 - 10:06 AM
Might be the answer, they are not as 'readout' precise as the digital ones.
But all you actually need is pass or fail, which it will do with ease.
Gerald Cardew used one and he knew a thing or two.
Posted 18 August 2009 - 10:49 AM
Edited by holly, 18 August 2009 - 10:52 AM.
Posted 18 August 2009 - 11:43 AM
Posted 18 August 2009 - 01:18 PM
1) Light Pellet
2) Pellet with lube
3) Gun (ie:- shrouded - muzzle - silencer - barrel to far or to close to the sense)
6) Pilot Error
and I'm still legal
Posted 18 August 2009 - 04:08 PM
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