Aguila Interceptor is accurate in CZ's Ultra Lux Superexclusive!
March 10, 2015
My Fellow Shooters:
In my CZ Ultra Lux Superexclusive in quiet air from a supported position Aguila Interceptor 40 gr. .22LR has grouped 1" at 100 yards, 2.5" at 200 meters, 3.3" at 300 meters, 6.5-7" at 400 meters, 10" at 500 meters, 12" at 600 meters. The muzzle velocity was remarkably consistent 1462-1468 averaging 1465 fps- better than any match load from the 28.5" barrel. This is a remarkable performance. I would not use this load from a semi-automatic or a weak action like a pivoting block. Anyone who doubts this is welcome to come to the range. The round appears to have at least one third greater powder charge than any other .22 LR and it seems to contain two different powders indicated by a curious fouling building up about 8-10" beyond the chamber requiring cleaning and drying every 8-10 rounds if maximum accuracy is to be maintained; this is not unlike the 40-65 and 40-70 black powder cartridges or the .45-70 with black powder which require a wipe from the breech every ten shots to maintain accuracy. One mystery of the round is the opening of the group size past 300 meters when it pretty much doubles to 6.5-7" at 400 meters. A change in bullet stability due to diminishing velocity is the best explanation. One thing that fascinated me was the precise response to sight adjustment at 400 meters on Montgomery Yellowbooks; one click and I saw the group center climb a few inches. Between 300 and 400 meters the adjustment on the Mendoza sight is 150 clicks minimum. To 500 meters you must use all the elevation on the rear and drop the front sight 75%; it is a good idea to have some white paper above and below your target at 500 meters. For 600 meters drop your factory 452 front sight as far as you can get firm screw fastening. You might have to hold 12:00 on your target, depending on the temperature. No wind is the desired ideal for this kind of shooting. Penetration at 600 meters in creosoted gum railroad tie is the length of the bullet plus 1/16". In other words the round is about done at 600 meters. I have tried about every kind of .22 LR load made and have never encountered this kind of performance from any of them but Aguila Interceptor.
Respectfully,
Dr. William Harper, Ph.D.+