Consistance + or - 1..... HOW????

[Kaiser Bob]

IIRC your average chronographs have something like an 8% margin of error, which translates to some inaccuracy in measuring deviation.

[Aranarth]

How much effect does everyone else have with the retro if you don't shoot consistantly. I get in excess of 30 fps lower on the first shot, and if I shoot inconsistant, lucky to get within +- 7 at the chrono. Of course, it goes +- 2 or 3 when I make sure to pull evenly.
-AranarthX

[sniper1rfa]

KB - 8% inaccuracy is within 24 fps, maybe you thinking .8% (2.4 fps)? or even .08% (.24 fps)?

[manike]

I believe the hand held chrono makers claim it to read the velocity to within 3% of the actual velocity. But they are certainly capable of repeatability within 1fps. It's just that each value may be within 3% of the actual velocity of the projectile. But with any chrono that 3% appears to be fixed over all readings.

So if you get two readings such as 299 and 300 the shots velocities were within 1 fps of each other but may have been from 290 to 309 in real life.

Hand held chrono's in a calibrated test actually read within 1fps of each other at the outside.

manike

[sniper1rfa]

thanks manike, thats what i was getting at. they are consistant enough to measure deviations, just the actual values may be higher or lower, but the same distance apart.

i have so much trouble explaining things in writing.

[RT_Luver]

have a very consistent tank, have a good barrel paint match, make sure your orings in EVERYTHING are good and not worn down, dont break paint so it doesn't clog up the barrel and mess its path up

[felony]

the paint to barrel match must be it for me.

i shoot field paint, PMI premium through a bigshot barrel. while chronoing with my mag and flatline setup i am like +-6
FPS. sometimes more.

as always first shot doesnt count as air is slightly building up and all the shots must be the same. as in always pull the trigger the same way. i find that you are more consistent when you do that.

dan

[felony]

another quick question.

if the ball roles down the barrel while holding the barrel verticl, is the bore of the barrel to big.

the bigshot is .689 while the auto spirit is .686
any ideas on that?

i love my big shot barrel wouldnt hesitate about getting the autospirit just as long as it gives better performance. only problem is with the new extreme bodys comming out and a new barrel.



dan

[sniper1rfa]

[Arturus]

Originally posted by felony
another quick question.

if the ball roles down the barrel while holding the barrel verticl, is the bore of the barrel to big.

the bigshot is .689 while the auto spirit is .686
any ideas on that?

i love my big shot barrel wouldnt hesitate about getting the autospirit just as long as it gives better performance. only problem is with the new extreme bodys comming out and a new barrel.



dan

I have the AutoSpirit, but often hesitate to use it. Even with All-Stars I often find myself not being able to blow the ball down the barrel. The balls are so tight in the barrel, that I have to use a straight-shot and gently push it out. Even with 'fresh' paint, I've had problems. I've yet to have a barrel break with it, but I do know when I have to use a straight-shot to push it out... Well, it's too tight.

I revert back to the Rt Pro stock barrel at that point.

[dawump]

I had a really hard time getting things consistent for a while and got really discouraged. Even with really good maintenance I had wild +/- results.

I have an ebay mag, and when I got it I swapped out all the junk aftermarket bolts, regs etc. In doing so I didn't realize that I'd put things out of balance. The previous owner had installed a power tube spacer which might have been perfect for the aftermarket bolt that he had been using, but wasn't perfect for the standard bolt I replaced it with.

My shots were really inconsistent, and the trigger pull felt inconsistent. I didn't realize about the trigger until I fired someone elses mag. I did some research and bought a power tube spacer kit and it made an INCREDIBLE difference to both the feel of the trigger ( a really crisp pull ) and the consistency of shot.

Of course, this is only going to work for you if you currently have an incorrect spacer.

Keith