customcutter
01-03-2014, 09:51 PM
I've said it before and I'll say it again. I think the key to consistency with the laps and or the reamers is being able to make a consistent size and ogive.
I was thinking today about Cane Mans using a factory bullet to make laps with and it finally dawned on me. After he did this he has to "size" his bullets. Don't get me wrong there is nothing wrong with that process just an extra step. Then I wondered why does he have to size them. He's lapping with a .224 bullet with a lapping compound between the lap and the die. That extra few thousandths doesn't vanish, it causes the die to be just slightly over size.
Then I remembered the article about the dentist who would make as many as 30 laps for his dies, each one .0005" larger than the last. He was able to do it because of the "hydraulic" fluid in his lathe heating up until it stabilized.
I just received my 12 tubes of diamond lapping compound the other day. My D-reamer is .218 and a 6s ogive. I'm going to try and make at least 4 laps with the largest being .223, all with the same 6s ogive. I'm trying to figure out how to mount a grinding wheel on a arbor like Teddyblu did. My air pencil grinder just doesn't have the torque needed for the job.
I was thinking today about Cane Mans using a factory bullet to make laps with and it finally dawned on me. After he did this he has to "size" his bullets. Don't get me wrong there is nothing wrong with that process just an extra step. Then I wondered why does he have to size them. He's lapping with a .224 bullet with a lapping compound between the lap and the die. That extra few thousandths doesn't vanish, it causes the die to be just slightly over size.
Then I remembered the article about the dentist who would make as many as 30 laps for his dies, each one .0005" larger than the last. He was able to do it because of the "hydraulic" fluid in his lathe heating up until it stabilized.
I just received my 12 tubes of diamond lapping compound the other day. My D-reamer is .218 and a 6s ogive. I'm going to try and make at least 4 laps with the largest being .223, all with the same 6s ogive. I'm trying to figure out how to mount a grinding wheel on a arbor like Teddyblu did. My air pencil grinder just doesn't have the torque needed for the job.