I'm actually also very happy with mine, it's just curiosity. The thing is built like a tank so I don't really know if there is much that can go wrong.
Take a look at this shot string, shooting .25 33.95 JSB -- unsorted, straight out of the tin :
Shot count: 24
Low: 265
Hi: 269
Avg: 267
STD Dev: 0.9
Spread: 4.0
14/09/2021 14:54:57 --> 267
14/09/2021 14:55:15 --> 267
14/09/2021 14:55:38 --> 268
14/09/2021 14:56:03 --> 269
14/09/2021 14:56:23 --> 266
14/09/2021 14:56:50 --> 266
14/09/2021 14:57:11 --> 268
14/09/2021 14:57:24 --> 267
14/09/2021 14:57:46 --> 267
14/09/2021 14:57:57 --> 267
14/09/2021 14:58:29 --> 268
14/09/2021 14:58:48 --> 266
14/09/2021 15:00:12 --> 267
14/09/2021 15:00:36 --> 267
14/09/2021 15:00:57 --> 267
14/09/2021 15:01:20 --> 265
14/09/2021 15:01:37 --> 267
14/09/2021 15:01:49 --> 265
14/09/2021 15:02:26 --> 266
14/09/2021 15:02:39 --> 266
14/09/2021 15:03:12 --> 267
14/09/2021 15:03:35 --> 268
14/09/2021 15:03:54 --> 267
14/09/2021 15:04:38 --> 267
It's bonkers. Actually for my back yard it's shooting too hot so I dialed it down :
Shot count: 24
Low: 246
Hi: 252
Avg: 249
STD Dev: 1.4
Spread: 6.0
19/09/2021 17:08:18 --> 248
19/09/2021 17:08:54 --> 248
19/09/2021 17:09:41 --> 247
19/09/2021 17:10:27 --> 249
19/09/2021 17:11:17 --> 249
19/09/2021 17:11:42 --> 248
19/09/2021 17:12:22 --> 246
19/09/2021 17:13:14 --> 248
19/09/2021 17:13:40 --> 250
19/09/2021 17:14:13 --> 251
19/09/2021 17:14:38 --> 248
19/09/2021 17:15:06 --> 250
19/09/2021 17:20:08 --> 249
19/09/2021 17:20:41 --> 250
19/09/2021 17:21:01 --> 248
19/09/2021 17:21:21 --> 249
19/09/2021 17:21:49 --> 250
19/09/2021 17:22:53 --> 250
19/09/2021 17:23:19 --> 248
19/09/2021 17:24:09 --> 252
19/09/2021 17:24:32 --> 250
19/09/2021 17:25:18 --> 251
19/09/2021 17:25:55 --> 248
19/09/2021 17:26:16 --> 248
Seems I have some more spread now but it doesn't bark as much. Also, still unsorted pellets. I really should try to find a good pellet, the ones I was shooting had all kinds of inconsistencies. Isn't JSB supposed to be the bees knees? Skirts are bent, the head looks like it had craters in it.
Maybe I need to order a tin of AA or FX pellets, they are still JSB made but with a different die.