I just received a 6BR reamer in the mail that I ordered off the shelf from JGS, and it has 3* throat angle. Can someone educated me on throat angle? I've noticed that a 3* throat angle doesn't seem too common across other prints. My intentions were to run 105 Hybrids with this barrel, or maybe have it throated for 108 ELD-Ms.
6BR reamer thoughts?
- Thread starter sethrows
- Start date
Dusty Stevens
Shiner
That is a 6br remington reamer- not lapua- is why nothing looks familiar. I think butch lambert has a bunch of the brass youll need stockpiled.
As the reamer is is off the shelf, can you exchange it?
Other than the print name, what makes you say it's a BR remington reamer? I think @ .200 (.4714), the shoulder (.4609), and case length (1.570) is fine. I'll stand corrected if not, I was told it's the same print as #1262 minus the freebore and lead angle.
Thank you, that's what I assumed if I do get it throated for the 108s. Out of curiosity, whats the idea behind 3* angle? I've google'd the heck out of it and have found only a brief bit of information. Is there any cons over it vs say a 1*30" if I left the chamber as cut and shoot it with Hybrids or something similar? The current reamer I've been using (1 barrel) is definitely tight @ .200 (.470), my Forster die's have worked out with it so far, but I know it'll eventually catch up which is I why purchased this reamer.
On JGS print #1262, the freebore is .0940 (U&V) and the leade angle is 1-30-0 (J)...can send you a copy for comparison if you like. Built a 6BR this past summer off print #1262 and had it throated for the Berger 90gr BT Target...JGS measured a dummy cartridge and came up with a freebore of .0740. I was initially using a Redding Type S FL bushing die, but the B0 that Harrells sent me has worked out better.
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tclaunch
Silver $$ Contributor
This is a reamer I have owned, that I like a lot. It also is a stocked item.
I got the #1262 saved also. Thank you though!
They didn't have #1262 available, sounded like a 12 week wait otherwise I'd been on it. I did ask about it, and was told this print was the same minus the freebore and throat angle. I guess, if the 3* will cause me issues or be a pita, I could exchange it and be a little more patient.
riflebarrels.com/a-look-at-bullet-ogives-and-chamber-throat-angles/
Article off Dan Lilja's website...
I had to read this article a couple times yesterday, before I posted here. It was an excellent read.
It's a .237 bore, but I've got a set of pilot bushings .235-2378
After comparing my copies of #1125 and #1262, the freebore and lead angle are the only differences I see.
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the 3* included angle was tried successfully with 65-70 gr boutique bullets in short range,,,(some military stuff had it too) but most shooters discovered that as the bbl. wears this lead in ramp area mimics a 1-30 lead no matter how it starts,,,I would shoot it and enjoy the bbl.....Roger
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