It's been more than 1.5 years and finally my new BR rifle is together - it's time to fireform some brass. But first I've got to load some rounds to fireform; new 6.5x47 Lapua cases. I'm new a this and my question to you all is what size neck sizing bushing should I use to obtain the target loaded neck diameter.
The reamer has a 0.2945 inch neck, so I assume the chamber is that size, 0.2945. It is unclear to me which clearance I should use between the loaded rounds and the chamber; my understanding is that 0.003" is fairly standard. However, looking at Tony Boyer's book (The Book of Rifle Accuracy, 2010, page 139) for BR rifles with tight neck chambering (this one is), it says the goal is to have a very small clearance of 0.001 to 0.002" between the loaded round and the chamber. Based on this varied feedback, it is unclear to me whether the clearance should be .001, .002 or .003"; what do you think.
Assuming, because I am a novice at this, I stick with 0.002 or .003 clearance (I'm concerned about getting dirt in a very small 0.001 clearance), which size neck bushing should I use for each of these?
Overall, the three questions are (1) which clearance should I use between the loaded round and the chamber, (2) which size neck bushing should I try to obtain this clearance, and (3) if it turns out I need to reduce the neck thickness, which neck turner should I get/use for this 6.5x47 round.
All comments are welcome!
Cassidy
The reamer has a 0.2945 inch neck, so I assume the chamber is that size, 0.2945. It is unclear to me which clearance I should use between the loaded rounds and the chamber; my understanding is that 0.003" is fairly standard. However, looking at Tony Boyer's book (The Book of Rifle Accuracy, 2010, page 139) for BR rifles with tight neck chambering (this one is), it says the goal is to have a very small clearance of 0.001 to 0.002" between the loaded round and the chamber. Based on this varied feedback, it is unclear to me whether the clearance should be .001, .002 or .003"; what do you think.
Assuming, because I am a novice at this, I stick with 0.002 or .003 clearance (I'm concerned about getting dirt in a very small 0.001 clearance), which size neck bushing should I use for each of these?
Overall, the three questions are (1) which clearance should I use between the loaded round and the chamber, (2) which size neck bushing should I try to obtain this clearance, and (3) if it turns out I need to reduce the neck thickness, which neck turner should I get/use for this 6.5x47 round.
All comments are welcome!
Cassidy
