AirForce Texan and JSB XXL 234 gr 45 cal ammo

[Randbo]

I tried Jeremys suggestion of sizing the XXL's with my Lee .457 sizing die and I think it was a improvement, shot 5 shot 50 yard group of 1.530" ctc  and 5 shot group of 4.293" ctc at 100 yds., that was filling to 3000 psi every shot. I then filled it to 3000 psi. and shot it 3 times at 50 yds. without filling after every shot first 2 were .390" and the third made it 1.292". So then I shot 6 shots at 100 yds. filling every 2 shots and got a 3.75" group ctc. Shot 3 shots over coronagraph and got 881, 868 and 849 fps so that would be about 416 ft.lbs of energy    avarage for the first 2 shots.

[jkingsouthafrica]

I tried Jeremys suggestion of sizing the XXL's with my Lee .457 sizing die and I think it was a improvement, shot 5 shot 50 yard group of 1.530" ctc  and 5 shot group of 4.293" ctc at 100 yds., that was filling to 3000 psi every shot. I then filled it to 3000 psi. and shot it 3 times at 50 yds. without filling after every shot first 2 were .390" and the third made it 1.292". So then I shot 6 shots at 100 yds. filling every 2 shots and got a 3.75" group ctc. Shot 3 shots over coronagraph and got 881, 868 and 849 fps so that would be about 416 ft.lbs of energy    avarage for the first 2 shots.

Next thing is to weigh them as from what I have read there are a number of different weights in each box     weigh them and put them into like weight batches    you should find this also helps a lot

[Randbo]

I sorted the XXL today like you suggested Jeremy but did not see any improvement, I shot two 6 shot groups at 100 yds. 5 1/2" and 4 3/4" it don't seem to like anything at 100 yds.

[jkingsouthafrica]

I sorted the XXL today like you suggested Jeremy but did not see any improvement, I shot two 6 shot groups at 100 yds. 5 1/2" and 4 3/4" it don't seem to like anything at 100 yds.

  Just to show you how well Big Bore  Diabolo Pellets can shoot, First group was shot with my Texan  at 85 yards outside . My pellets are a JBS King 180 grain that we make. The pellet is sized to .456
The second  group was shot at 100 meters using a .58 cal  JBS King  380 grain  using an XP Airgun  in the Netherlands
Looking at the XXL the skirt been so long is removing weight from the nose of the pellet towards the back . If you look at the majority of small cal pellets the weight of the pellet is in the nose of the pellet not in the skirt.
Ive included a photo of the .457 next to a .58 cal and a 73 cal Diabolo so you can see that the nose of the pellet is where the weight is the one thing you cant see is how thin the skirt walls are so all the pellets are very nose heavy like a shuttle cock

[MJP]

This is a good example on quality control, and I believe yours is better Jeremy 
Try shooting on different pressures and power wheel settings to find the sweet spot.
Marko

[Randbo]

I shot some 340 gr. hollow point bullets that I cast from a Lyman mold today and they look like they might make a good deer hunting bullet, I shot one group at 100 yds of 2" filling every shot and one group of 3" filling every two shots. 802 fps. first shot and 791 second shot. I will have to do some more testing with this bullet.

[pepegraves]

I shot some 340 gr. hollow point bullets that I cast from a Lyman mold today and they look like they might make a good deer hunting bullet, I shot one group at 100 yds of 2" filling every shot and one group of 3" filling every two shots. 802 fps. first shot and 791 second shot. I will have to do some more testing with this bullet.

Sounds really promising. A good HP is what we need...'m wondering how well they will expand

[Randbo]

If I could average 3" groups at 100 yds. I would be happy and so far out of the dozen bullets I have tried these are the best. I don't think they will expand much unless you hit heavy bone they don't have a very big hollow point, but I don't think that is a big deal the hand gun hunters swear by hard cast bullets and they don't expand at all.

[pepegraves]

If I could average 3" groups at 100 yds. I would be happy and so far out of the dozen bullets I have tried these are the best. I don't think they will expand much unless you hit heavy bone they don't have a very big hollow point, but I don't think that is a big deal the hand gun hunters swear by hard cast bullets and they don't expand at all.

Time to start getting my act together...hunting season will be here b4 we know it...I've got my eye on a bruiser that escaped me last season.....

 Anyway, back to the subject of the thread...I think the JSB 45 cal leave a lot to be desired and, I just think you shouldn't have to work that hard to get a pellet that expensive to shoot well

[KnifeMaker]

You guys might have better luck with them if you put them though a sizing die to size the skirts down to either 456 or 457.
Just from all the work I  have done on Big Bore Diabolo pellets they do need to be sized correctly to make them accurate

Sir, I've talked myself blue in the face here, as have others to try and get folks here to understand that you must just about always size for a big bore. But I have given up. It has fallen on deaf ears.

Dout it will get any better soon. Many seem to be happy with what amounts to mediocre accuracy in their big bores for what ever reason.
Guess people think if it makes a big hole, who needs accuracy. LOL!!! 

If I can't get superb accuracy, a gun, regardless of calibre doesn't stay around me for long. Period!

Knife