Questions:
1. I have a new Wilson/Sinclair micrometer case trimmer. On putting some new Lapua .223 cases through the other day, something odd happened. I set the trimmer up to trim the cases to 1.745",my chamber is short-necked @ 1.753"). Most of the cases were fine, variance of no greater than 0.0005" either way - and then every now and then, a case would be trimmed to 1.742".
I'm a bit mystified. I did nothing different on the times a shorter case was produced. Has this happened to anyone else, can anyone shed any light on this, or is this sort of variance to be expected?
2. Also, the most consistent results came when using the hand crank. When I tried a few with the Sinclair power adapter for the cordless screwdriver - length variance was greater and the length of trimming was much less. To get 1.745", I had to set the micrometer to 1.730". I'm guessing the thing is calibrated for use with the hand crank and the power adapter screws in further, causing this variation?
Any feedback on the first issue most welcome.
Cheers, Justin
1. I have a new Wilson/Sinclair micrometer case trimmer. On putting some new Lapua .223 cases through the other day, something odd happened. I set the trimmer up to trim the cases to 1.745",my chamber is short-necked @ 1.753"). Most of the cases were fine, variance of no greater than 0.0005" either way - and then every now and then, a case would be trimmed to 1.742".
I'm a bit mystified. I did nothing different on the times a shorter case was produced. Has this happened to anyone else, can anyone shed any light on this, or is this sort of variance to be expected?
2. Also, the most consistent results came when using the hand crank. When I tried a few with the Sinclair power adapter for the cordless screwdriver - length variance was greater and the length of trimming was much less. To get 1.745", I had to set the micrometer to 1.730". I'm guessing the thing is calibrated for use with the hand crank and the power adapter screws in further, causing this variation?
Any feedback on the first issue most welcome.
Cheers, Justin
