7mm Backcountry pfft

[UnckleBob]

30-06 in a SA cartridge already exists, it's called the .30 Thompson Center. Nobody cared, it's most notable now for being the parent case of 6.5cdm.

The 30TC cannot achieve 30-06 velocities out of a 16" barrel.

The magic of the 7BC is not velocity. It about replacing a 7RM velocities from a 24" barrel with 7RM velocities from a 16-18" barrel.

 

[bnewt3]

30-06 in a SA cartridge already exists, it's called the .30 Thompson Center. Nobody cared, it's most notable now for being the parent case of 6.5cdm.

To say nobody cared ill bet is not quite accurate.

Nobody cared enough to be a guinea pig, I believe that.

Being pretty much only available in T/C rifles is a massive hindrance(not necessarily because T/C, but any cartridge only available from one manufacturer almost never does well).

308 is already commonly owned, known, and trusted.

 

[bnewt3]

The 30TC cannot achieve 30-06 velocities out of a 16" barrel.

The magic of the 7BC is not velocity. It about replacing a 7RM velocities from a 24" barrel with 7RM velocities from a 16-18" barrel.

thres an echo in here.

Ive been beating my head against this wall for months.

 

[Kimber7man]

Yes. I too cannot comprehend the invention of a new straight wall cartridge when we already have the 45-70. But, then again I don't even shoot straight wall cartridges so maybe, perhaps, I don't understand the nuance because I don't use it.

Application based. There are still states that require straight wall cartridges to hunt deer, so there you have it. My state used to, thankfully we’re allowed centerfire now (on private land).

 

[AlaskaRed]

thres an echo in here.

Ive been beating my head against this wall for months.

I have one in a tikka t3x. 17.5" barrel. My 7BC shoots the 170 TA at 2940 fps. Not exactly 7RM handload speeds, I had my 24" 7RM shooting the 175 NP at 3200. But, the math on the 7BC will achieve good expansion at the distances I want to hunt at. I'd like to try some handload testing with it soon.

 

[AlaskaRed]

Application based. There are still states that require straight wall cartridges to hunt deer, so there you have it. My state used to, thankfully we’re allowed centerfire now (on private land).

Absolutely. That was the point I was getting at. I have a friend who lives in Illinois I hunt deer with time to time. Theres a whole world of straight wall shooters that I care not to enter, nor throw my unexperienced opinions at them either.

 

[omicron1792]

I think they worry about rolling this tech out to existing cartridges. Maybe they are afraid people will get 5.56 peak alloy ammo then use it in a 299 Walmart AR?

I think the technology is awesome. I’m afraid they are going to try and use in all new cartridges (6mm BC, 5.56 BC) and not release peak alloy into existing cartridges.