Federal 6.5 Backcountry?

[RME]

Im not arguing the physics, just saying that you are arguing an academic non issue as most people will run a can and/or hearing protection with short 6.5CM, and folks are shooting bigger calibers with far more muzzle blast. Also, and please stop experimenting on yourself, I'm worried for your well being.

I was thinking the same thing. I've shot thousands of rounds from specialty pistols with 10-15" barrels and I have no idea what they sound like because I've never touched off a round hunting or otherwise without ear pro. I used to hunt with too many deaf, "one shot won't hurt", guys to not protect my ears.

 

[The_Yetti]

I found myself in front, but a little to the side of a Abrams in Iraq. Those 7 rounds without hearing protection hurt and had a bit of an effect!

 

[OneGunTex]

Take this from a guy who believes in suppressors. I believe that if I’m polite enough to put a muffler on my car, I should put one on my firearm.

Wait, if I straight piped my hot rod, does that make me an a^^h*le? What if I just bought it like that?

 

[teflonhunter]

Take this from a guy who believes in suppressors. I believe that if I’m polite enough to put a muffler on my car, I should put one on my firearm.

LOL , I don't think I'm the polite type. Don't own a suppressor.

 

[BLJ]

My load in my 6.5cm at sea level in an 18in barrel carries the minimum upset velocity I'm comfortable with to 550 yards. Ya, that'll do.

That’s right at what I was coming up with for a 147 ELDM 2400 MV.

That’s a poke for me.

 

[Chris in TN]

So, I have a question about the high-pressure steel-case concept in general. This question would apply to any caliber.

What about primers? Does the extra hoop strength in a steel case versus brass, help stop primers from blowing?

I have been shooting a 5.56 pressure (but well below predicted max in GRT, and my chrono results support that) load in my .223 and with one certain brand of primers (that is historically known for this, though it's irrelevant as they haven't been imported in over a decade) - Tula small rifles - I get 'blanking' every few shots. I discontinued their usage. Good news is, I have other primers; bad news is I have a good many of those TulaSR I will need to burn elsewhere, and I don't shoot those 'elsewhere' calibers much at all anymore.

But that highlights an issue - primers tend to be the weak link in ammo. An overpressure brass case load is likely to blow out a primer before it ruins a case, and of course if the primer pocket enlarges, there's nothing to stop the primer itself from rupturing.

All that to set up my question: Are our legacy primers strong enough to withstand 80kpsi when used in steel cases? Or does this new ammo indicate a need for a thicker cup or steel-cup primer? Is priming a steel cup primer into a steel casehead a safe exercise with conventional equipment? Or should we just expect to see primers flattened with no attendant problems to go with that?

I'm genuinely not asking to be critical. I just don't know the answer to these questions and don't remember seeing them discussed, though I'll admit I didn't read the entirety of every thread we've had.

 

[wind gypsy]

So, I have a question about the high-pressure steel-case concept in general. This question would apply to any caliber.

What about primers? Does the extra hoop strength in a steel case versus brass, help stop primers from blowing?

I have been shooting a 5.56 pressure (but well below predicted max in GRT, and my chrono results support that) load in my .223 and with one certain brand of primers (that is historically known for this, though it's irrelevant as they haven't been imported in over a decade) - Tula small rifles - I get 'blanking' every few shots. I discontinued their usage. Good news is, I have other primers; bad news is I have a good many of those TulaSR I will need to burn elsewhere, and I don't shoot those 'elsewhere' calibers much at all anymore.

But that highlights an issue - primers tend to be the weak link in ammo. An overpressure brass case load is likely to blow out a primer before it ruins a case, and of course if the primer pocket enlarges, there's nothing to stop the primer itself from rupturing.

All that to set up my question: Are our legacy primers strong enough to withstand 80kpsi when used in steel cases? Or does this new ammo indicate a need for a thicker cup or steel-cup primer? Is priming a steel cup primer into a steel casehead a safe exercise with conventional equipment? Or should we just expect to see primers flattened with no attendant problems to go with that?

I'm genuinely not asking to be critical. I just don't know the answer to these questions and don't remember seeing them discussed, though I'll admit I didn't read the entirety of every thread we've had.

My Inquiries elsewhere on the topic below. I THINK LedZep is miles neville of hornady but not positive:




Haven't seen any answers to this clarification question:

 

[Chris in TN]

My Inquiries elsewhere on the topic below. I THINK LedZep is miles neville of hornady but not positive:

View attachment 1079472
View attachment 1079473

Haven't seen any answers to this clarification question:

View attachment 1079474

Thank you. That's very helpful - insofar as it highlights that there's no official pat answer yet. I think it's a question I want to see answered before I even consider going down this road. And, again, I'm not likely to go down this road myself anyway, but I'd hope that when others do, they think this stuff through before jumping in.

 

[bnewt3]

Thank you. That's very helpful - insofar as it highlights that there's no official pat answer yet. I think it's a question I want to see answered before I even consider going down this road. And, again, I'm not likely to go down this road myself anyway, but I'd hope that when others do, they think this stuff through before jumping in.

could be naive or ignorant on my part, but I would assume load data will specify primer if something out of the norm is needed.

 

[diverc18]

Here in AK we have a couple freight forwarders in WA we can ground ship things to and they bring them up by boat rather inexpensively. Does HI not have a similar service?

Not that I know of. I’ll have to look into that. Just got off the phone with Kygunco and they ship ammo to Hawaii now. 63 dollars shipping and no hazmat fee. 10 boxes of tmks on preorder. Way cheaper than going through my ffl.