---Barrel Life?---

[blopez50]

I have most of the stuff layin around to build another AR (with the exception of the barrel). I think I'm gonna start thinking about what to turn these parts into!

The only "type" of AR that I don't currently have is a heavy barreled bench gun. I'm thinking long bull barrel, PRS stock, Timeny trigger, all that fun stuff. I want a rifle that I can shoot a lot. I want to be able to put 50 rounds per range trip then take it out and shoot 100 at pdogs.

I've pretty much narrowed it down to 2 options. 6x6.8 or 6x45. I love the 6mms and have a lot of bullets/brass available for both of these.

I'll be shooting the 58gr Vmax out of a 24-26" barrel regardless of what round I choose.

With all that said, the only thing keeping me from the 6x6.8 is that I don't know what the barrel life would be like. I don't "need" a .2" shooter but I'd like to keep it .5" as long as it lives! I don't have any experience but anecdotally, it seems like it would be nearly impossible to shoot out a 6x45 while a 6x6.8 might have the potential to go a little quicker.

For those of you in the know, would you shed some light on this for me?

Thank you!!!

[blopez50]

For what it's worth, guys are saying 2500+ on the 6mmBR. I figure the 6x6.8 has a little smaller case capacity (not much) so it should be right around there if not a little more.

Any flaw in this logic?

[GLSHOOTER]

Realistically the 6X45 would last longer. That being said the 6X6.8 is about on the high end of mid way to the 6BR. The 6X45 is burning 30 grains + or - 1 MAX. The 6X68 maybe 32 + or - 1 MAX. The 6 BR is about 35 +or - 1 MAX. ( Hodgdon quick check)

6X45 easy 5-6,000 rounds. 6X6.8 easy 4-5,000 IMHO. (With super accuracy). The 6X6.8 will coast when the 6X45 is straining a tad and give you a better shot if you go crazy and want to go to 90+ projectiles. The 6X6.8 will smoke a 55 grainer out there with the 6BR. We do this routinely with no pressure signs.

Given that I have shot the 6X45 over two decades and the 6X6.8 around a year or so I would still go with the 6X6.8. I have so much faith in it I just ordered up an 18" tube for my new 3 Gun upper to replace my 6X45.

One other thing I haven't seen a shot out BHW barrel yet.......HMMMMM.

Greg

[Tooreal]

Apr 18, 2013 17:03:35 GMT -8 GLSHOOTER said:

Realistically the 6X45 would last longer. That being said the 6X6.8 is about on the high end of mid way to the 6BR. The 6X45 is burning 30 grains + or - 1 MAX. The 6X68 maybe 32 + or - 1 MAX. The 6 BR is about 35 +or - 1 MAX. ( Hodgdon quick check

One other thing I haven't seen a shot out BHW barrel yet.......HMMMMM.

Greg

I have wondered about the life of the Black Hole barrels, and I am Uber Happy to hear this ;D

How will the 264 LBC Barrel Hold up Greg?

Thanks for answering all of my questions, It's greatly appreciated

Eric

[GLSHOOTER]

I believe the bigger bore will let alone go a bit longer than the 6X6.8. Case capacity is almost identical between the two.

Look for 4500 to 5000.

Greg