Remington 6-1/2 SRP

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SSN Vet

SSN Vet

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Just consumed the last of my Win SRPs.

Back when primers were hard to find.... I picked up a couple boxes of the Rem 6-1/2 thinking that I was lucky to find any at all.

Now I've just noticed this warning label on Midway USA..

Warning:
•Remington does not recommend this primer for use in the 17 Remington, 222 Remington, 223 Remington, 204 Ruger, 17 Remington Fireball. Use the 7-1/2 Small Rifle Bench Rest primer in these cartridges.
Click to expand...

I'm loading .223 Rem for use in an AR.

But.... I can't find this warning on Remingtons web site, and it is not on the primer packaging.

Also, there are feedback reports on Midway from guys saying they use 6-1/2 primers to load .223 Rem without any problems.

So what's the rub? Potency? Hardness? (to prevent slam fire)

I've loaded hundreds of rounds with WSR primers, and have never had a slam fire.

.223 Rem is the only SRP cartridge that I have.... so I'm hoping that I can use the 6-1/2 primers and not have them go to waste.

Any body out there use them for .223 rem?
 
The Remington 7-1/2 primers came about because after Remington introduced the 222 Remington, they had a rash of pierced primers.

The 7-1/2 corrected that problem.

I use the Remington 7-1/2 exclusively in my 17 Remingtons. I am not as fussy with my 223 Remington or 221 Remington Fireballs but I have never tried Remington 6-1/2s for the above reasons.

I might load a few to try but expect the worse.
 
Well, I have already loaded up 60 rounds of my "m193 clones" ... 24.8gr H335 under a 55 gr FMJ pill, using the 6-1/2 primers...

So I'm hoping somebody is going to chime in and say "I've loaded hundreds with 6-1/2 primers and never had a slam fire"

I may be shut down for a while, otherwise.
 
Sorry Vet but as you now know the 6 1/2 primers are not for .223 ammo. I use only CCI#41, Remington 7 1/2 or in a pinch CCI450 primers for my .223 ammo meant for a semi-auto. CCI400's work just fine in a .223 bolt action rifle...
 
anybody want to trade for 1,900 Remington 6-1/2 primers?
Click to expand...
I would not hesitate to try them in small pistol applications. Back off the charge a hair at first and check velocities compared to your regular load.

Got a .22 Hornet?
 
Make that 2,900 primers :banghead:

Of course, I'm ripe with small pistol primers as well.

But only two sleaves of WSR primers left....

I did load 50 rounds with the 6-1/2 primers before I realized the "warning"...

So I will very carefully shoot these and inspect the fired cases.
 
So I will very carefully shoot these and inspect the fired cases for pierced primers.
Click to expand...

fixed it...

I'm really, really hoping this turns out to be a non-issue....

my searches haver turned up replies that fall into one of two themes...

1. I used rem 6-1/2 primer for my AR loads and never had a problem.

or ...

2. Don't use them, becasue they gave that warning for a reason and you will most certainly die.


I've yet to find a "I used them in my AR using less than max loads and got pierced primers"
 
That bolt face has seen repetitive use of high pressure loads leaking around the primer from case heads that have been over expanded from the pressure. That's abuse.
 
I loaded about 500 with pull down propellant and 55grain FMJ pulls to duplicate 223 factory and fired them in one of my Mini 14's before I saw the warning. I never observed any problems with them but used the remainder in my .22 Hornet and the MP40 with 9MM+P rounds. I would try a few and see if there are problems If not shoot what you have loaded. I used mostly CCI in my 223 but also purchased some when the shortage was happening for backup stock.
 
Thin Primer Cups Blow Out @ High Pressure

Walkalong, the bolt was damaged by using Federal No. 200 primers which were labeled "Small Rifle Primers and High Velocity Pistol". These primers should never be used in a high pressure round like the 223 Remington. They will blow out on the edge, cutting pock marks in to the bolt face. In 1959, early 60's, Federal sold these primers. Now the 200 is for magnum pistol ONLY. Federa200RiflePrimers.jpg If you must use them, load at low pressure under 40,000 PSI. :)
 
SSN Vet said:
fixed it...

I'm really, really hoping this turns out to be a non-issue....

my searches haver turned up replies that fall into one of two themes...

1. I used rem 6-1/2 primer for my AR loads and never had a problem.

or ...

2. Don't use them, becasue they gave that warning for a reason and you will most certainly die.


I've yet to find a "I used them in my AR using less than max loads and got pierced primers"
Click to expand...
I have not tried them personally but a buddy loaded up 500 .223 rounds using the Rem 6 1/2 primers and he did have a problem. I personally saw the pierced primers but the loads were up near the top of the pressure range. (but not overpressure) If you have to use them you might have no problems if you use the starting charge of the powder you choose.

For example, using a 55gr Speer SP bullet Hodgdon is reporting pressures of only 40,800 CUP with a starting charge of H335. I doubt those pressures will cause the primers to pierce, even the Rem 6 1/2 primers. Almost 50,000 CUP with the max charge is a different story of course...
 
damaged by using Federal No. 200 primers which were labeled "Small Rifle Primers and High Velocity Pistol".
Click to expand...
I still have some of those. IIRC, I bought them to try in .22 Hornet. Even so, they shouldn't leak around the edges. Do you have any idea how many rounds it took to do that amount of damage?
 
Walkalong, no idea how many rounds, out of 1000 primers. Not all primers ruptured. Running on full auto back then, didnt know it was happening till it was to late for the bolt. Primers did not leak around the edge, they blew out on the rounded part of the cup. Yes, i know a leak between the case & primer will produce holes in the primer cup. The same lot number of 10 lbs powder, & 5000 bullets had been loaded over many years. Other primers were not a problem at maximum pressures. A new lot of 5000 CCI 400 primers flow into the firing pin hole, i can not use them at maximum pressures in a Savage Axis. Rem 7 1/2 show no flow, same loading. Had some Rem 9 1/2 that were defective many years ago. They blew out on the rounded edge even at low pressure. Maybe defective Federal 200 primers also??
 
I would not hesitate to try them in small pistol applications. Back off the charge a hair at first and check velocities compared to your regular load.
Click to expand...
This is what I have done without issue, loading 9mm and 38 Special range ammo with the 6 1/2's.
 
Primers did not leak around the edge, they blew out on the rounded part of the cup.
Click to expand...
Interesting, but makes sense, they would be the weakest and the bend.
 
what I loaded so far.... and intend to test is a "warm" load of 24.8 gr H335 pushing a 55 gr Win FMJ bulk bullet from Midway

I've shot several hundred of this load with WSR primers with no issues....

I'll try to give it a wirl this weekend and let you guys know how it goes....

I've been loading .357 mag with WSP primers and 2400 powder and get a lot of black grains when I shoot. I've been under the impression that this is unburnt powder. Maybe I just found my life time supply of mag pistol primers ;)
 
SSN VET, your loading would seem to produce less pressure than my IMR 4198-21.5gr load with the same bullets. Your powder has a slower burn rate too. The Win bullet does not have a lot of bearing surface, compared to some, less pressure.
 
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