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COROVICD
19-05-2004, 08:56 AM
Does anybody have ballistic coeficients for FAC pellets and their wieghts in grains ?

Just want to calculate trajectories and zeroing points in ChairGun.

Cheers,
Dejan

Jon Budd
19-05-2004, 12:41 PM
BisMAgs, 21 grain, 0.034 - 0.037
AA Field, 16 grain, 0.030 - 0.032

Nothin else worth using IMHO ;)

COROVICD
19-05-2004, 03:11 PM
thanks once agian

COROVICD
19-05-2004, 03:19 PM
Just out of curiosity, did you tried using 16 grain AA Fields on 40 ft/lbs ? Do they realy buckle and loose accuracy under at that pressure ?

Cheers,
Dejan

clubshot
19-05-2004, 03:47 PM
Originally posted by COROVICD
Just out of curiosity, did you tried using 16 grain AA Fields on 40 ft/lbs ? Do they realy buckle and loose accuracy under at that pressure ?

Cheers,
Dejan


Dejan,
16.00 & 20.50 Grain rounds in .22 Exterminators are not effected by High Power ;)

email me for a Trial pot

bob.r@practicalpistoluk.com

The original Logun Penetrators ;)

BOB/R

Kev.G
19-05-2004, 04:01 PM
:D :D :D and heres me thinking you nearly missed that chance bob:D ive got to hand it to yer;)

kevG

Jon Budd
19-05-2004, 05:56 PM
He's too good for that :)

biggles
19-05-2004, 06:07 PM
Originally posted by clubshot
Dejan,
16.00 & 20.50 Grain rounds in .22 Exterminators are not effected by High Power ;)

email me for a Trial pot

bob.r@practicalpistoluk.com

The original Logun Penetrators ;)

BOB/R

do you know (and would you share with us) the BC of the Exterminators/Penetrators?

Cheers

Biggles

lionel
19-05-2004, 07:33 PM
I regularly use AA Fields at 40 fpe through the BSA barrel of my Stalker Tiger Ten LE. They group very well indeed.

H&N Barracuda Match are also very good- similar pellet to Magnum.

Lionel

COROVICD
19-05-2004, 08:06 PM
Thanks,

this clears the picture 'cause I was tool at a local gun shop that FAC rifles deform pellets, so that you need to drop power to 30 ft/lbs. I realy prefer to have a few stronger shots with longer range, rather than more weaker ones.

cheers,
Dejan

Jon Budd
19-05-2004, 08:26 PM
The deformation is not actually wrong, it's just incomplete...

In MANY barrels, 40FP will not result in an AA Field grouping at all well - Theoben barels are an example. OTOH, BSA barrels do seem to shott thme very well at high power.

Bear in mind though that whilst you lose some trajectory advantage with Bisley Magnums, the long range effectiveness may be better due to a greater resistance to wind drift....

They also will typically have an extra 1 - 2 FP at the muzzle...

30FP is about the point I would GENERALLY move to Bisley Magnums...

HTH - JB

COROVICD
19-05-2004, 08:40 PM
I've just put those coeficients into ChairGun and Bisley Magnums, zeroed at 50 yards, are droping only 6 1/2" on 80 yards. That is about 2 rabit's heads. That is not bad.

Cheers,
Dejan

Russ6357
20-05-2004, 01:06 AM
Buddyboy has hit it on the head.

The only pellet I have found the reliably works above 30ftlbs is the biz mag.

My Eliminator only shot very well with them.

My Rapid worked Ok with lighter pellets but even then I got more fliers than with Biz Mags.