Brno308
Active Member
Hi All
I have Lapua cases in .308 cal that has been fired 3 times and I am preparing them for a 4th firing. I bought these cases brand new and have only neck sized thus far.
I make use of a Redding case neck gauge and have zero'd the dial calipher on the mandrel. I have my cases arranged in 7 rows of 5 in my case block.
Here are the measurements I get from the case neck gauge as per above arrangement:
Row 1
15 - 16, 16 - 17, 15 - 17, 16 - 16.5, 15 - 17
Row 2
16 - 17, 15 - 17, 15 - 16.5, 15 - 16, 15.5 - 16
Row 3
15 - 16, 15 - 17, 14.5 - 16, 16 - 17, 15.5 - 17.5
Row 4
16 - 18.5, 16.5 - 19, 15.5 - 18, 17- 17.5, 15 - 16
Row 5
15 - 16, 15 - 16.5, 15 - 16, 15 - 18, 16 - 18
Row 6
15 - 16, 15 - 16.5, 15 - 17, 15.5 - 18,15 - 16.5
Row 7
15.5 - 16, 15 - 16, 15 - 17, 15.5 - 16, 15 - 16.5
Now, I must admit I am somewhat challenged when it comes to feet and inches since we use the metric system in SA. What exactly am I measuring when the caliper shows 15 for example. Does that represent 0.0150 of an inch? Kindly explain please.
What do you see in these measurements, are the variations extreme or acceptable?
Your input would be appreciated, thanks.
I have Lapua cases in .308 cal that has been fired 3 times and I am preparing them for a 4th firing. I bought these cases brand new and have only neck sized thus far.
I make use of a Redding case neck gauge and have zero'd the dial calipher on the mandrel. I have my cases arranged in 7 rows of 5 in my case block.
Here are the measurements I get from the case neck gauge as per above arrangement:
Row 1
15 - 16, 16 - 17, 15 - 17, 16 - 16.5, 15 - 17
Row 2
16 - 17, 15 - 17, 15 - 16.5, 15 - 16, 15.5 - 16
Row 3
15 - 16, 15 - 17, 14.5 - 16, 16 - 17, 15.5 - 17.5
Row 4
16 - 18.5, 16.5 - 19, 15.5 - 18, 17- 17.5, 15 - 16
Row 5
15 - 16, 15 - 16.5, 15 - 16, 15 - 18, 16 - 18
Row 6
15 - 16, 15 - 16.5, 15 - 17, 15.5 - 18,15 - 16.5
Row 7
15.5 - 16, 15 - 16, 15 - 17, 15.5 - 16, 15 - 16.5
Now, I must admit I am somewhat challenged when it comes to feet and inches since we use the metric system in SA. What exactly am I measuring when the caliper shows 15 for example. Does that represent 0.0150 of an inch? Kindly explain please.
What do you see in these measurements, are the variations extreme or acceptable?
Your input would be appreciated, thanks.