.308 to 6mmBR advice

[powderburnz]

I’ve hit the limitations of my .308, I’m done with it. Tossed around.243 AI but I’ve decided on 6br. Can you fellas help me with barrel brand, twist for 1000yrd goal. Barrel length and a starting load. Thanks in advance.

[charlie b]

Is this for fun or serious competition?

If just for fun you can get along with quite a few mfgs. If for competition then mfgs like Kreiger, Bartlein, etc would be the choice.

Pick the mfg and give them a call. They can set you up with something suitable.

[hamiltonkiler]

Welp. Get a .300wm

JK. Do as you please.

Copy the 1000yd bench champs gun.


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[powderburnz]

Is this for fun or serious competition?

If just for fun you can get along with quite a few mfgs. If for competition then mfgs like Kreiger, Bartlein, etc would be the choice.

Pick the mfg and give them a call. They can set you up with something suitable.


I only compete with myself. Ha

[Texas10]

Prefits are available in 6BR, so if you're a member of the change your own barrel club, Northland shooter supply sells Criterion and Shilen in a Savage Prefit. They're both excellent and typically can be in your hands in a few days. I've used both on my Savage actions. The Criterion is as good looking on the inside as the Shilen select match. I bought a 28 inch 8 twist heavy varmint and put a tuner/break on it and it'll do 1000 yds easily. !07 SMK over 30 gr. Varget, lapua case, CCI 450. 400. BR-4, Fed 205, or what have you.

[GaCop]

Prefit are available in 6BR, so if you're a member of the change your own barrel club, Northland shooter supply sells Criterion and Shilen in a Savage Prefit. They're both excellent and typically can be in your hands in a few days. I've used both on my Savage actions. The Criterion is as good looking on the inside as the Shilen select match. I bought a 28 inch 8 twist heavy varmint and put a tuner/break on it and it'll do 1000 yds easily. !07 SMK over 30 gr. Varget, lapua case, CCI 450. 400. BR-4, Fed 205, or what have you. +1:thumb::thumb:

[jpx2rk]

I just screwed a 8T Shilen 24" on a FV12 action about 3 weeks ago, have about 50 rds down it so far, but only the light bullets. Heavies are hard to come by and $$. I might try mine out at 600yds for giggles just to see how it does for future pdog trips.

[charlie b]

So, for fun or hunting, the Criterion, Shilen, or Shaw will work well. I am thinking of a Krieger or Bartlein for mine. I've always wanted a custom cut barrel.

[powderburnz]

So what’s the difference between ratchet rifling and 5R

[Robinhood]

So what’s the difference between ratchet rifling and 5R

https://hosting.photobucket.com/albums/y298/Packdog1/General/HGR_Barrels_and_Rifling_Profile_Types.jpg

[Dave Hoback]

It’s a secret! But it has something to do with making new things & then people BUYING those new things.....because they’re NEW THINGS! It’s all very sciency and stuff.

[powderburnz]

It’s a secret! But it has something to do with making new things & then people BUYING those new things.....because they’re NEW THINGS! It’s all very sciency and stuff.

Ha!! Awesome

[charlie b]

I always found it interesting that barrels advertised as polygonal rifling are not polygonal. They should have called it multi-lobe rifling, but, that probably doesn't sound interesting enough.

[mikebritton]

Been playing with guns since the early 60's.
Learn something new every day. Had no idea about the different types of rifling! Cool!

Ratchet rifling looks as if it might be hard to keep clean.

[Dave Hoback]

I always found it interesting that barrels advertised as polygonal rifling are not polygonal. They should have called it multi-lobe rifling, but, that probably doesn't sound interesting enough.

Well, they wanted to call it POLYGAMAL Rifling, because of the multi-lobe factor. But that would have been a little...., ya know... WEIRD!

[Dave Hoback]

BTW, here is Shilen’s Ratchet rifling next to is conventional 6-groove.
https://i.ibb.co/fvzsJT8/D1-B0-BA4-B-BC88-4-EC5-B5-FF-EEF2-F42-FCC76.gif (https://imgbb.com/)

[wbm]

POLYGAMAL

All the different rifling profiles come down to the, "Well you still Lieutenant Dan", kinda thing for me.

[charlie b]

And some people still swear the 2 groove rifling in the 03's and Enfields. :)

[Dave Hoback]

Honestly, I don’t see any benefit to one over the other. My first post in this thread was worded in jest, but it reflects my true feelings. I don’t believe there is any empirical data or case study to support the superiority of one over the rest. Much like the caliber debate. New, more “BETTER-er” calibers come out year after year. What....are the they getting into NEGATIVE MOA groups?? (I’m sure a few Creedmoor fan boys think so...LOL!) No...it’s just a new spin on the SAME product, supported by clever marketing. Same thing with rifling.

[Fuj']

Well if it were me with a 6mm, I'd skip the BR and go with a Dasher and 4 groove Brux barrel.
Or skip the 6mm, and do a straight 284 Winchester and 180 class bullets.