07-29-2020, 07:43 PM
I just took a sized 6 CM case I have on hand, and a new 103 eldx, and 105 bthp bullet. Stuck each bullet upside down into the case mouth and made a light score with my knife blade, to give a "line" at the base of ogive. Then compared the 2 scores. From the bullet-bases the scores are virtually same distance but the eldx is longer than the bthp, so... since I seat for OAL by the tip, the delta would be a longer, narrow eldx sticking into the bore. My eldx measures 1.264 and the bthp 1.220 (JBM has the 103 eldx at 1.258).
I don't have any 108's.
So a coal of 2.220 for the bthp could run out to 2.264 for an equivalent in the 103 eldx.
If I'm doing this right...
If someone has some 108's try to find the coal diff a 108 would seat at, given the "bthp" chamber sizes we're talking here.
I don't have any 108's.
So a coal of 2.220 for the bthp could run out to 2.264 for an equivalent in the 103 eldx.
If I'm doing this right...
If someone has some 108's try to find the coal diff a 108 would seat at, given the "bthp" chamber sizes we're talking here.