F/tr reamer

[aj300mag]

Dave, do yall have a 2013 F/TR reamers in stock? Any idea on how much bearing surface is left in the case with the 185's?

As I check with their staff, they do not have them on shelf. So, you have to order and wait around 6-8 weeks as I done.



Dave, Thanks for valuable info of reloading. Could you please check e-mail for the result about both reamers. I took those reamers on hand and inspected as you recommend. I also attach many pics as reference.





The above pic was the same F-TR Reamer (.342 nk, lead 1-30 just different in fb)

Can any one tell the different between left one and right one?

Which one is .168 fb and which one is .088 fb

Reamer on the left is the .168" free bore reamer. The area indicated by the brackets drawn is the neck...

 

[savageshooter86]

I know that. If I was reading one of his reamer prints, which figure on the diagram is the freebore length? I know it is either letter A or B on his print diagram.

Thanks

 

[memilanuk]

Any idea on how much bearing surface is left in the case with the 185's?

~0.150 thou, maybe a little less. Mine reads ~0.140; another person with a chamber cut by the same smith with the same reamer says 0.160". Might be the variation in user technique in taking the reads...?

 

[aj300mag]

The barrels with the short freebore can be fixed with a throating reamer, done by hand without removing the barrel from the action. Cost shouldn't be the full price of chambering a barrel blank.

 

[jsthntn247]

Any idea on how much bearing surface is left in the case with the 185's?

~0.150 thou, maybe a little less. Mine reads ~0.140; another person with a chamber cut by the same smith with the same reamer says 0.160". Might be the variation in user technique in taking the reads...?

Thanks, I was told that I needed the bullet diameters length in the case but wasn't sure how much I "really" needed before accuracy suffered.

 

[memilanuk]

Thanks, I was told that I needed the bullet diameters length in the case but wasn't sure how much I "really" needed before accuracy suffered.

Old-school rule-of-thumb used to be 1/2 caliber minimum of bullet shank in the neck. Whether that was more for accuracy or for keeping the bullet from getting knocked out of whack, I can't say. Also, I don't know if that applies equally to flat-base bullets as well as the newer long-range boat-tail designs with relatively longer tails. I do know that I've shot B155.5BTs with a lot less than 1/2 cal... more like 0.090-0.100" of bearing surface... with outstanding results.

YMMV,

Monte

 

[Mr. Ten-X]

Just a quick question about this .342" neck. What are current lots of Lapua cases measuring on the OD as loaded, with no turning?

TYIA

 

[gsg5pk]

Just a quick question about this .342" neck. What are current lots of Lapua cases measuring on the OD as loaded, with no turning?

TYIA

.342" nk will suitable for all un-turn brass.

Most load round of Lapua brass was measure .338" nk

Wall thickness 0.015"

 

[Mr. Ten-X]

Thank you, sir.