varmint243
09-04-2013, 05:09 PM
I cast 300 boolits with a new mould and am getting what I feel is a lot of variation in weight.
It's a Lyman 38 148 full wadcutter.
I am using range salvage lead, I shoot target velocities so hardness doesn't matter much.
A friend did a harness test and it is more or less what WW is.
Here are the numbers I ran on a small random sample.
Is this what you would expect ?
A friend suspects my lead is dirty, I use a Lyman bottom pour, so I assume all the crud goes to the top.
Thoughts ?
Pact Scale +/- .1
no lube
142.6
143.3
143.3
143.5
143.7
143.7
143.9
144.0
144.1
144.1
144.6
144.7
144.7
145.0
145.7
145.9
average 144.2
max 145.9
min 142.6
median 144.1
stdev.s 0.9
max spread 3.3
average 144.2
div/100 100.0
1 percent = 1.4
spread 3.3
percent of bullet weight max spread 2.3%
average 144.2
div/100 100.0
1 percent = 1.4
stdev.s 0.9
percent of bullet weight stdev.s 0.6%
It's a Lyman 38 148 full wadcutter.
I am using range salvage lead, I shoot target velocities so hardness doesn't matter much.
A friend did a harness test and it is more or less what WW is.
Here are the numbers I ran on a small random sample.
Is this what you would expect ?
A friend suspects my lead is dirty, I use a Lyman bottom pour, so I assume all the crud goes to the top.
Thoughts ?
Pact Scale +/- .1
no lube
142.6
143.3
143.3
143.5
143.7
143.7
143.9
144.0
144.1
144.1
144.6
144.7
144.7
145.0
145.7
145.9
average 144.2
max 145.9
min 142.6
median 144.1
stdev.s 0.9
max spread 3.3
average 144.2
div/100 100.0
1 percent = 1.4
spread 3.3
percent of bullet weight max spread 2.3%
average 144.2
div/100 100.0
1 percent = 1.4
stdev.s 0.9
percent of bullet weight stdev.s 0.6%