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Old January 23, 2013, 12:09 PM   #1
kilotanker22
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30-06 help

Hello not long ago I bought a remington 700 in 30-06. Put some factory ammo through it everything was peachy. Worked up a load for it then switched to a magnum primer.

After switching to the magnum primer I have noticed the report seems to be louder but muzzle blast seems to be less also it recoils more like my 300 win mag. Just wondering if a mag primer could cause these changes? By the way it shoots lights out.

165 grain hornady SST 57.5 grains of h4350 and a CCI 250 magnum primer
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Old January 23, 2013, 12:22 PM   #2
cosnyka
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It is possible the magnum primer is burning the powder more thoroughly sooner, rather than some powder burning nearer the muzzle and creating more blast. I wouldn't expect your recoil to change; it may be sharper as you've altered the pressure curve.
I've used that same combination of bullet, powder, and primer in a few rifles.
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Old January 23, 2013, 12:29 PM   #3
kilotanker22
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thanks cosnyka

I too was surprised at the change in recoil you are probably right though the recoil is definitely sharper and I think I perceived it as more. One thing I am sure of is that it was definitely noticeable.
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Old January 23, 2013, 01:14 PM   #4
chris in va
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According to my Lyman manual, 57gr of 4350 is a compressed max charge with a 165gr ballistic tip bullet. 57.5 is above that even, then throw in a magnum primer...yikes!
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Old January 23, 2013, 01:16 PM   #5
Guv
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Define the difference between report and muzzle blast. Any change in components should be acompanied by a reduction in powder charge.
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Old January 23, 2013, 01:46 PM   #6
kilotanker22
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report and muzzle blast

The difference in report is the the rifle is simply louder considerably louder according to my friend who stood next to me at the bench. I wear ear plugs and sometimes noise is subjunctive so him and I switched places and I was the by stander firing both rounds. One with a magnum and one with standard.

To define muzzle blast. The smoke and any noticable blast at the front of the firearm at discharge. I can not measure muzzle blast only give an opinionated observation. Seems to be less.

On another note I got my load data from hodgdon with a start load of 54 grains of said powder and a maximum load of 59 grains of said powder with a wlr primer.

Its not really a huge problem just looking for a little insight. This is the first time I have ever used a magnum primer in a standard case.
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Old January 23, 2013, 02:24 PM   #7
cosnyka
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Chris, 57 g is not a compressed load in my cases. Were you referring to H4350 or IMR 4350?
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Old January 23, 2013, 03:06 PM   #8
kilotanker22
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Chris, 57 g is not a compressed load in my cases. Were you referring to H4350 or IMR

I have a the same result. They are very close to compressed though.
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Old January 23, 2013, 05:10 PM   #9
hooligan1
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Why the magnum primer? The powder charge with the standard LR primer is sufficient. When substituting primers: regular to magnum, One should back off charge weights at least 10%. 57.5 grains of H 4350 is a compressed load according to Nosler # 6.
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Old January 24, 2013, 08:58 AM   #10
Rimfire5
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I have experimented with LR and magnum primers with my .270 and .30-06 loads on the assumption that a magnum primer would ignite the powder column a bit more vigorously.

In both calibers, the accuracy was slightly better with the magnum primers and the point of impact is slightly different (1/4-3/8ths inch at 8 o'clock at 100 yards with the .270) with the magnum primers.
The average group size was tighter with the magnum primers (0.860 for the LR primers versus 0.761 for the magnum primers with the .270 using 140 grain Nosler BTs with 54.8 grains of IMR 4350 at depth 3.370). That is .020 off the rifling in my .270 with the 140 Nosler BTs.

My chronograph measured velocity with the magnum primers and the same load with the magnum primers was about 12 fps faster on average with the .30-06. SD was almost identical.
I didn't chronograph the .270s (didn't set it up that day).
I didn't notice any appreciable difference in recoil with either caliber.

I have more testing to do with a variety of loads but these results were interesting.
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Old January 24, 2013, 09:24 AM   #11
William T. Watts
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It is appropriate to use a magnum primer with IMR4350 or slower stick powder I.E 4831, 7828 etc for reliable ignition, additionally I always use a mag primer with ball powder. Cold temps is another reason to use magnum primers with the above mentioned powders, I had a hunting trip to Colorado that didn't turn out well because of my choice of using a standard primer with IMR4350.. FWIW Hornady manual says 57 grs is a max load with their 165gr SST, the only thing I can find fault with you should have reduced your charge of 4350 by a couple of grs when you switched to the magnum primer, reestablished that the 57gr charge didn't produce pressure signs. Anytime you change /switch components you should work up the load again.. Don't get in the habit of assuming all is well when you make what you assume will be minor changes, this hobby doesn't work that way.. William

Last edited by William T. Watts; January 24, 2013 at 09:37 AM.
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Old January 24, 2013, 09:32 AM   #12
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Quote:
It is appropriate to use a magnum primer with IMR4350 or slower stick powder I.E 4831, 7828 etc for reliable ignition, additionally I always use a mag primer with ball powder. Cold temps is another reason to use magnum primers with the above mentioned powders,
I have not used a magnum primer w/ 4831, but with IMR7828 and H414, I get better (more consistant) performance, particularly in cold weather, when using magnum primers in loads for my .270WIN.
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Old January 24, 2013, 11:47 AM   #13
kilotanker22
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Thanks all signs of pressure seem to be OK. Like I said it shoots lights out so I may not change anything. Does anyone have any idea what kind of velocity I might be getting. Maybe a ball park?
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