300 BLK primers?

S

Sgt_Jamez

Sergeant
Full Member
Minuteman
Dec 24, 2009
265
0
Carmichael, CA
#1
I was using CCI BR4s and 400s on the BLK and got cratering. I posted here about it and was told I could switch to 450s. Then others have said not to use magnum primers with the BLK.

Conventional wisdom says to use magnum primers with ball powders. Is there a "gotcha" when it comes to the BLK? Why should I NOT use CCI 450s with the BLK?
 
#4
Re: 300 BLK primers?

i dont see a reason to use magnum primers but I also dont have a reason for you why not to BUT if your runnin into pressure issues a bell would go off in my head sayin relook magnum primers when others arent using them
 
#5
Re: 300 BLK primers?

So far I've never used magnum primers for ball powder, rifle or pistol. No issues and the loads are accurate, but nothing is at maximum either.

I'm about to shoot my first batch of .300 blackout through my AR15. I actually used Remington small pistol primers and H110 powder but again, they aren't anywhere near max. loads. The reloading data says the pressure should be down around 23,000 psi. Pretty low and less than some pistol ammo so I thought I'd give the small pistol primers a try. More later.
 
#6
Re: 300 BLK primers?

I tried a lot of different Powders & the one that I think treats the Pressure right <span style="font-weight: bold">& Leaves the Primmer's looking the Best</span> <span style="font-weight: bold">even when you are pushing the pressure to the higher ends is (<span style="font-size: 11pt"> N-110 Vihtv.)</span></span>
I can not say enough about Vihv. N-110 even on the Sub. Vel. Loads . Pretty clean burn but still has the Gas to cycle dependable too with the shorty w/pistol position GB.
.
 
#8
Re: 300 BLK primers?

Never used mag primers on my 300, never had issues.

I did have issues with H110 but have had great results with #9 and lil gun.
All my shooting is with 12-inch rock barrel, pistol gas, suppressed, and subsonic.
 
#9
Re: 300 BLK primers?

High Vel. w/V N-110 -&- AR15 ( 8.5 inch ) SS 5r /pistol position GB
-
110 grn Sierra Varm. HP . 17.0 grn. @ 2000 fps.
125 pointed soft-point . 16.5 grn. @ 1875 fps.
130 Speer Varm. HP . 16.5 grn @ 1900 fps.
155 Berg. VLD . 15.0 grn. @ 1700 fps.
.
 
#11
Re: 300 BLK primers?

I have been using whatever primers I can put my hands on, some cratter some don't, while none are flattening to a dangerous level, I really don't care how the primer looks as long as the load is safe, cycles and hit where aimed at, can't reuse the damn things anyway.
hope this helps.
cheers.
 
#12
Re: 300 BLK primers?

attherange... can't re-use them meaning after one firing you are getting loose pockets? I am getting mixed signals on brass life. Some guys are saying it's mild on brass. Are you only getting one loading from your BLK brass?
 
#13
Re: 300 BLK primers?

Sure he attherange can speak for himself, but I think he is saying he doesn't "care what the primers look like . . . can't reuse them (primers) anyway"

Randy
 
#14
Re: 300 BLK primers?

I lookied in my Notes & I did not write the OAL down for the 130 Speer HP's .
But I usually just Run all bullets just lightly touching the Lands for OAL .

The sierra 110 HP's have to be the Most accurate of all bullets I ran out a .300 AR .-( Both AR & 16" Boltaction ). In a 16" 5r Boltaction with 17.5 grn N-110 & your pushing the 110 sierra hp's 2300 fps vel.
110 sierra hp's . Only downfall is that they are pretty short bullet in length for an AR & Feeding 100%, that you can trust .
I just run an Eotech for glass on my 8.5" & they are really tight group @ 50 yrd.zero . but A buddy of mine Scoped his 8-inch shorty BLK & just stacked them in almost 1 ragged hole @ 100 yrd every time .

The most reliable for the Feeding that I have found is the long & narrow point 155 VLD's . & the Mag. is almost filled end-to-end also with no rounds moving back & forth in the stack .
Those things Feed 100% flawless like a champ .
If I had to choose a bullet just on the fact of a bullet you can count Feeding & NOT ever Mal.Functioning in a .300-221 Or a BLK & AR . That would be it . & the 155 VLD are Pounding over 800 Ft/lb's @ impact 100 yrd . & @ 50 YRD. it's hitting over 900 Ft./lb's impact also .<span style="font-weight: bold"> With that Energy & 1700 fps is NOT to Pussy @ All, for 155 grn & a .300-221 or BLK . with a ( little 8-Inch Barrel ) Suppressed .</span>

Also I found the Hornady 130 grn Pointed/soft-point's Run real reliable also for Feeding . I never ran them with Vivt. N-110 .
I ran them with AA#9 with 15.5 grn @ 1950 fps.vel. .
I also shot a couple coyote with them & they did Knock the crap out of them .
.
 
#15
Re: 300 BLK primers?

sgt-Jamez, sorry for the confusion, i was talking about the primers only, I have some LC brass with 4 reloads on it an it is going strong, of course 17.5 gr lil'gun with a 147FMJ is not a really hot load.
Rtodd, you are spot on sir.
 
#16
Re: 300 BLK primers?

Awesome! You guys are coming through with great info. I am chasing down pressure issues so I have had to go back to my load data and reset QL to use the Winchester measured case cap and back my loads off. I am switching over to LC brass and just got a case capacity measured last night. 24.3grs averaged over 3 measurements on an LC01 headstamp.

Good news on the Sierra 110s as they are pretty easy to get and are fairly cheap. I have some Speer HP 130s loaded now, and I'll be loading some Hornady SP 130s tonight.
 
#17
Re: 300 BLK primers?

just don't buy a big pile of the sierra 110 grn Hp's right off the bat.
they can be a little finicky on the Feeding . So see how dependable you can get them first .
I love them but I would not bet the farm for Not Jamming, Just When you need a follow-up shot the Most .
.
 
#18
Re: 300 BLK primers?

<span style="font-weight: bold">HEY ANYBODY ...got any solid mechanical info</span> for getting the Sierra 110 grn Hp's Feeding 100% like a champ on AR .??? .
I would kiss your ass for a week to get them to run where I can Really count on them for rapid-fire On Varmint/coyote hunting out my AR .
.
 
#20
Re: 300 BLK primers?

I Shoot a lot of AR15 . But it is, 'Not my Specialty' ...for trouble-shooting .
& especially for trouble-shooting Mechanical Feeding Issues with .300-221, a ( Non- .556 Round it was primarily designed for ) .
-
My M4 Ramped Upper I have & Barrel Feed-Ramp is pretty nice mated/fitting & smooth for Feeding .
I have tried a couple different Manufactured brand Mag's that I have also .

Fixing AR Feeding issues is not my strongest point .
* It will never Run fully without jamming 1 to 2 round out of a ten round rapid cycle .
<span style="font-weight: bold">( Me, Eye-balling/Looking @ the Malfunction. ) ... Jamming with bullet pushed in the ( Nose Up ) position with the Bolt & CG pressed hard against it .

*but* . I can get 100% Feeding & extractions with just 'Manually' pulling snapping the Bolt open & closed with the Charging handle & out the Magazine .
but under full firing cycles it will Mal.</span>

I Think & have always chalked-it-Up to . the 110 grn Hp Sierra's & just because the Bullet is so Short + the Total OAL of the loaded Round is just Too Short also to Feed right .
.
 
#21
Re: 300 BLK primers?

Hmm... I haven't fired any of the 110s yet, and haven't been able to rapid fire the BLK at all. Only had it on the range bench trying to find a load that won't blow primer pockets! :p Hopefully soon... A) The AAC/Sierra 125gr OTMs will be available for purchase and B) I can get out to the woods and not have the RSO pissing on my cupcakes.
 
#22
Re: 300 BLK primers?

Only time I have blown Primmers is when I get 'To much Powder' & carried away with the reality that the 30-221/BLK is not a HotRod & never will be a Rocket .
Once I started loading it up for reliability & function ahead of speed . Then all just fell into place .

I would love to make the 110 sierra's hot 100% & tha's a NICE Varmint Round especially since I get it going comfortably @ 2-K vel. out a 8-inch barrel & Not abusing the Brass or Primmers . But that's not a deal breaker & will make it do what I need it for with other bullets .

But I just came back from the Range & ran 3 different 155's & I could Not get it to Mal. with rapid fire from Full Mag's.
I have Never had a Mal. with any of the 155 grn. so far . The 155 VLD's Feed like they were make for that platform . & good accuracy .
& it always stays Real Feeding Reliable until I get the bullet weights down to the 125's & lower weight & with there shorter bullets lengths .
.
 
#24
Re: 300 BLK primers?

Ya the Berger VLD's in 155 are the best running & best in there bullet shape & length for Mag. .
Shot 155 grn. Scenars, Nosler & some older sierras also out it also & ran without a hiccup also .
Flat-Base 150 grn. berger match run nice also .
.
 
#25
Re: 300 BLK primers?

try the sierra 125 with 18.5 gr of lil'gun, any primer, 2.03 AOL
cycle 100% from all kinds of mags, groups very decent at 100 yds and fly around 2100FPS out of a 16" carbine.
I think this maybe good enough for deer up to 200 yds.
hope this helps.
 
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