Hi all,

Going to be doing some loading this weekend for the 9.3x62. Will be working with RL 15 and 286 Noslers. I only have CCI Magnum primers. Is this an issue?

nope

nope

http://www.shootingtimes.com/a..._st_mamotaip_200909/

Mysteries And Misconceptions Of The All-Important Primer

We have tried 3 different primers, with various powders, in the 308 Winchester.

RWS 5341
FEDERAL 210M
FEDERAL 215

From a practical point of view, there was not much difference between them.

In the 300 RUM case, Magnum primers are required, as we kept getting hang fire.

Saeed, Yesterday was working with a .300 Win 700 Sendero. Load 72gr IMR4831, RP brass, Rem 9.5 (not 9.5M), 155 gr Nosler HPBT seated to one diameter.

First three one ragged hole at 100. Next two about 1" right. (I read your report on another thread where you had this happen to you) All 5 reports sounded just slightly different. My son standing behind thought so too.

I can't say there was a distinct delay, no click-bang. But wondering, could subtle hangfire explain this?

Have since made up more with 9.5M and WLRs to try. I have used those two primers in .300 Win for decades with never a suspicion of problem.

TIA, Rob

The OP is loading a 9.3x62, not a high pressure round, and medium burning powders, and around 50 odd grains of it. Any primer will work.
But for your 72 grains of 4831, I would definitely use a magnum primer for the reason you mentioned.

Thanks, DPCD. I used RP 9.5s in the '06 w/IMR 4350 for decades with no problems. Just figured I could get away with it in a .300 Win w/stick powder.

Any thoughts about the cutoff charge? And is it charge weight, or burn rate, or type (stick vs ball)?

No, I just figure it it says Magnum and burns a lot of slow powder, I use a mag primer.
Here is what I did yesterday; loaded 50 rounds of 9.3x74R. I thought I remembered I always use Federal magnum primers in it; so I loaded them up. After I was done I looked in my load records and it said I use standard primers. Took the rifle to the range today; no difference whatsoever. It regulated perfectly so if there was any difference I don't care.
I use a lot of 4350 too, with standard primers. Maybe the cut off for me is there so 4831 and it's ilk need magnums.
Burn rate is most important. Not sure with ball powders; they have some unique properties; best to follow the books on them.

I use Magnum primers in ALL my loading.

Magnums make it go faster.

Maybe I should go wink, wink so everbody will know I'm kidding?

Steve........

I once worked up a series of identical, graded (each step 0.5 grains) loads for my .270. In half of those, I used standard primers, in the other half, magnum. Don't remember what powder (probably IMR 4320, which my rifle likes) or brand of primers, and I think I used 130 grain bullets.

My recollection is there was no difference whatsoever in velocity, though if memory serves the magnum primers showed a slightly lower SD.

JFWIW

Today was perfect for chrono, uniform overcast, 70s, all at 100 yds, and 5 shots. Chrono @ 7 feet.


155 Nosler match, R 9.5M: 3014, 2980, 2987, 2966, 2972. 1.25"

155 Nosler match, WLR: 2983, 2970, 3000, 2992, 2987. 0.8"

Decided not to load and test 155s with R 9.5s again.


168 SMK, R 9.5: 3068, 3055, 3066, 3094, 3080. 1.4"

168 SMK, R 9.5M: 3113, 3066, 3082, 3154, 3061. 0.8"


Notes: .300 Win, 700 Sendero, 26", RP brass, all loads 72 gr IMR-4831. 155s were seated to one caliber at full diameter. 168s were seated to max COAL allowed by magazine (slightly greater than one caliber at full bullet diameter). WLR "for standard and magnum rifle loads".


I would not guess this from the chrono readings, but the 168s w/standard 9.5s sounded slightly different, not as "off" as the 155s w/9.5s the other day. Words like "echo" or "hollow" come to mind. Closest thing I can compare it to is the sound shotshells sometimes make with very slow burning powders like Blue Dot. Not at all crisp.

The 155s were slower, surprised me.

Anyway, am a convert to magnum LR primers for anything with more capacity than '06.

Here some notes of reloading that I did in November 2007 using Remington 9 1/2 and CCI Large Rifle (Standard) Primers.

270 WCF. Hornady 150 grain. H4831 55.0 grains. BRNO ZKK 600. Barrel 23.50". Temperature 53 degrees Fahrenheit.

Velocity:
2,809 fps w/CCI Large Rifle Standard.
2,803 fps w/Remington 9 1/2 Standard.

But that's not the remarkable thing. It's that velocity spread over five rounds was 30 fps with the CCI but 116 fps with the Remington.

So primer make can make a difference.

With 9.3X62 you should not have an issue. Check your chronograph as always.

Re15 will be fine. I found Varget better.