Dasher 200 line

[avidflyer]

I see a lot of the so called standard Dasher reamer prints have the 200 line around .4708 After speaking with some of the older guys that have been competing with that round for years, they like a 200 line around .4714 Any thoughts? I went with it for my new reamer, well see how it works...Talked to Whidden about dies, they reviewed the print for a sizing die, and they have nothing close to it for stock dies, but I have no issue paying for a custom die. (will send in fired casing of course)

 

[dmoran]

The larger the diameter, the easier for any die to be able to size it, which compliments generic dies.
The smaller the diameter, the less case-head stretch, which compliments tighter primer pockets and life.
Donovan

 

[JamesnTN]

The larger the diameter, the easier for any die to be able to size it, which compliments generic dies.
The smaller the diameter, the less case-head stretch, which compliments tighter primer pockets and longer life.
Donovan

If you have a reamer and die made to match the reamer then the case shouldn't stretch any more than the standard .4708 would it?

 

[Alex Wheeler]

.4714 is SAAMI. I prefer this or even large as most dies will not size the base if your chamber is any smaller.

 

[dmoran]

If you have a reamer and die made to match the reamer then the case shouldn't stretch any more than the standard .4708 would it?

James -
That is how mine were made, that come out sized at .469". It takes a very stiff load to get my own spent cases to measure much over .47 and typically have spent cases that measure +.4695-ish from my +3000-fps pet loads. When cross milling into case heads for inspection, I do not like what I see from stretched base/web that were used in larger chambers, that goes against precision in my opinion. All the 6BR Lapua new virgin brass I've ever had measure .468 to .469" when new, and I try to maintain that specification brass memory.
Donovan