I finally had a chance to shoot my AA 510 TC, .22 rifle, using the 18 grain JSB's, on paper at 50 yards. All I can say is WOW!! Not really surprised though. My experience with my AA 410 ERBSL .22 rifle, shooting the same 18 grain JSB Jumbo Heavy pellets was very similar.
The below target was shot a couple of years ago, during sight-in, with my AA 410 ERBSL .22 rifle. Five 18 grain JSB's in the 10 ring at 30 yards, and five in the head at 50 yards.
The 18 grain JSB's, and Air Arms PCP's just seem to be made for each other. The accuracy in my guns, with that pellet, is truly exceptional.
Wind wise, the mornings have been very calm, and I wanted to take advantage of that if I could. I was out and set up to shoot by 6 AM. There was zero wind, none, zip, nada. Not so much as a whisper. One of those rare mornings, when it was absolutely dead calm. Exactly what I was hoping for.
No time to dawdle though, because I knew it wouldn't last. As soon as the sun starts heating the ground, the updrafts start and the wind picks up.
I had my portable shooting stand set up, and portable target frame out in record time. I was putting pressure on myself to hurry up and get things set up, because I knew the calm conditions can change in a heartbeat.
I was shooting off of my Caldwell Shooter's Bag up front, and a Protektor heavy bottom Rabbit Ear bag on the rear. I have found that combination to be very stable to shoot groups from.
I had initially shot the gun at 20 yards indoors, and it was literally stacking the 18 grain JSB's one on top of the other. Based on previous experiences with other guns, with that type of accuracy, I knew she would be a shooter at 50 yards out of doors, and she didn't let me down.
Before starting to shoot, I filled the gun to 3000 psi. While doing the initial chrony work with the AA 510 TC, I determined that 3000 psi was the best fill pressure to use with the 18 grain JSB pellet.
I settled the rifle in the rests, and fired the first shot. I was holding center on the orange dot. The pellet landed a bit high right, at 2 o'clock in the 9 ring. (see target above) I made a small windage and elevation correction, to move the POI down and left, and fired the second shot. It landed a bit lower and left of the first shot, at 2 o'clock in the 10 ring. One more minor scope adjustment, and I sent shot number three down range. It took out the 1/4 inch orange dot in the middle of the 10 ring. WOW! I love shooting an exceptionally accurate gun when there is zero wind. Technically, the pellet landed slightly left of center in the 1/4 inch orange dot, lol, but close enough for gov't work.
Okay, time to get serious about sighting this thing in at 50 yards. I moved up to the eye on the prairie chuck target, and fired a five shot group. My hold was at 6 o'clock on the Prairie Chuck target's eye. The pellets simply followed each other through the same tiny bug hole. I covered the group with an ADVIL tablet. Ladies and gentlemen, I do believe we have a winner in the AA 510 TC .22. I added one click of right windage, and locked down the windage and elevation knobs.
In my experience, the Air Arms PCP rifles are always accurate, but this one is proving to be exceptionally so.
Time to hunt! I'll have this rig out in the local prairie dog towns next week. More to follow.