Slow ignition, I think, on rifle reload

[sraiford]

O.K If you've seen my earlier posts, I've started reloading for a 7mm mag. I've been reloading pistol ammo for a while, but since 7mm mag is $25-55 a box of 20, I thought it best to start reloading that.

So I do all the prep, measure powder, seat the bullet and measure. Everything is fine. I go to the range load the ammo and click...bang. It's a long enough pause that when I fired the first round, I pulled the trigger click, started to pull my head from behind the scope and bang. Now we're talking about 1/3 to 1/2 a second. Now I fired about 20 rounds and the same thing happened on all. I got used to it and the rounds hit perfectly and are accurate. So what might be the problem.

Hornady 154gr SP
H414 = 58gr
CCI Large rifle primer
2975 fps

 

[BayouSlide]

Should you be using a magnum primer with that load? And are you using a recommended powder, i.e. proper burn rate?

 

[sraiford]

DAMN!!!!! CCI #250 not #200 Well I guess that's my issue. Gonna head to Bass Pro to get a pack of 100.

So who wants to buy 900 CCI #200 Large Rifle Primers for $35.00. Paid $39.99 not including tax and used one pack.

 

[dzelenka]

Mag primers for ball powder, especially during cold weather.

 

[sraiford]

Another question?? Will the mag primer increase the FPS, due to possible more effiecent burn. Currently running at 2900 FPS.

 

[Barney88PDC]

Back off the load and work your way back up.

 

[HiCapMag]

You guys really think it's just a regular primer issue?

I would really be surprised by that.

 

[sksshooter]

what powder and how much of it are you loading?

 

[bayoupirate]

What percentage of the case volume is that charge filling? Your powder should fill at least 75 - 80 %.
If not, you'll never get consistency.

I'll skip the chemistry/physics lesson.

 

[sraiford]

Factory ammo (winchester shot 3150 fps)
H414 at 55 gr = 2758
H414 at 57 gr = 2880
H414 at 58 gr = 2993

and the powder is filling 78% of the casing, I measured it with my caliper.

The ammo shot true as can be. I was hitting a small diamond of the sighting target at 50 yds each and every time. Its just the delay in the ignition that had me worried. I just bought some #250 large rifle magnum primers, gonna make about 10 rounds and see how that does.

NOTE: ANYTHING YOU BUY FROM BASS PRO FROM THE RELOADING ISLES, ENSURE YOU AREN'T GETTING RIPPED OFF. I FOUND PACKS OF PRIMERS WITH HALF MISSING, AND CASES WITH ONE AND TWO PACKS MISSING.

 

[Barney88PDC]

You guys really think it's just a regular primer issue?

I would really be surprised by that.

I would be willing to bet. Slow powders need hotter ignition.

 

[bayoupirate]

Yep,
If you're getting the case that full, it's not an issue.
Primer would be the next culprit.

Let us know.

 

[sraiford]

Im at Precision now and it WAS a primer issue. Used magnum primers and absolutely no problem. There was no lag or delay in ignition in 12 rounds fired. Still have to chrono though. Thanks for the help everyone.

 

[bayoupirate]

Bingo!

Congrats on now "rolling your own".

 

[sraiford]

Bingo!

Congrats on now "rolling your own".

Well... they are smokin

 

[Akajun]

If you decide to change your load and ditch the ball powder, I recomend either h or imr 4350. It is a very forgiving and accurate powder, and I have never had issues of it acting up with regular or magnum primers in any weather in my 7 mag.

 

[dzelenka]

If you decide to change your load and ditch the ball powder, I recomend either h or imr 4350. It is a very forgiving and accurate powder, and I have never had issues of it acting up with regular or magnum primers in any weather in my 7 mag.

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