H335 for .223 -- Need magnum primer?


September 1, 2011, 07:12 PM
Speer's manual says they use it with magnum primer. Hodgdon told me Speer uses magnum primers for all ball powders. Hodgdon told me magnum primers were not necessary. What are people's experiences? Thanks.

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September 1, 2011, 07:21 PM
Hodgdon makes the stuff. Listen to them.

September 1, 2011, 07:30 PM
Magnum primers are only necessary for big charges of ultra slow burning ball powder. H-335 in a .223 is neither. Use standard primers.

September 1, 2011, 09:09 PM
I have been using H-335 with standard SRP's for a few years now with no problem. Never have used magnum primers with it. Same with W-748.

September 1, 2011, 09:19 PM
I use Rem 7 1/2 Primers for all my 223 loads. The Rem 7 1/2 is a Mag primer.

September 1, 2011, 09:48 PM
CCI400s here, no problems lighting a case full of H335 with a standard SRP;)

Mag primers will work, just dont need as much powder. Some have found the mag primers to be more accurate(YMMV)

September 2, 2011, 02:11 AM
I have always used a standard SR primer with H335 in the .223. Like said above, using a magnum primer will do no harm.

September 2, 2011, 02:24 AM
I've been shooting H335 in .223 for years now with SRPs, no problems.

evan price
September 2, 2011, 09:33 AM
I use a lot of H335 with regular primers.

September 2, 2011, 09:56 AM
Depends on whose primers I'm using.

If using CCI, I use a magnum (Speer/CCI should know about their primers).

If using Federal or Winchester, I use regular small rifle primers.

If I was using a spherical powder in an extreamly cold environment (Arctic Alaska) I'd select a hotter spark, hence a magnum primer. Probably the Federal ....

September 2, 2011, 06:28 PM
I've been using standard primers, CCI SR, with H335 for 40 years, thousands of loads. Works for me.

dagger dog
September 2, 2011, 08:26 PM
A lot of hand-reloaders use magnum primers with ball type powder,it's supposed to be harder to ignite under certain conditions.

Remington 7 1/2's are Small Rifle Benchrest.

I don't use magnum primers in small rifle even though Speer data does,also Lee states using Magnum primers with Winchester 296, and I guess these days that would include H110 as well.

I do use large pistol magnum primers in .45 Colt loading using H110-W296,learned the hard way had some squibs with complete charges, Wolf LP's just weren't hot enough to ignite the full charge in such a large case. Pulled down the 20 I had loaded and reprimed with CCI Large Pistol Magnum same charge weight and everything went BOOM instead of PUFF.

September 2, 2011, 09:06 PM
I had the same conversation with them. CCI said you needed mags Hodgdon said it didn't. I went with SR.

I've READ that SRM cause a larger ED when chronoed.

LTR shooter
September 3, 2011, 10:09 AM
I only use standard primers with H335 in .223 loads and the accuracy has been exceptional. Evidently the std. primer is doing the job.

September 3, 2011, 10:19 AM
Remington 7 1/2's are Small Rifle Benchrest.

Correct, but it is classified as a "mag" primer.





Then there is page 36 of Hornady #7 that classifies the 7 1/2 as a Mag primer.

September 4, 2011, 12:36 AM
Some distributors may call them magnum primers, but nothing I've ever seen in Remington's lit calls them magnum. Do you have any references to Remington's literature?

September 4, 2011, 09:54 AM
In my 223's I use the CCI 450 with BLC(2). In my limited experience I found accuracy and ignition greatly improved. My pet load is 27.5 gr. BLC(2) with a 40 gr. Nozler. The Speer manual is pretty clear about using a magnum primer and I think it is good advice. It may not be "necessary" but it sure helps. The 450 is the same price, never had anything bad happen because of using them, they improve accuracy...........for me it's a no brainer.

my guns are not AR platform, both are Ruger 77II Ultralite rigs. The only problem I have is that my son's rifle shots better.

September 4, 2011, 12:25 PM
I'm one of the reloaders who use magnum primers in all ball powder loads, in all calibers and cases. I have been using CCI primers for decades.

With magnum primers costing the same as standard, working up a ball powder load with magnum primers is a no brainer, and can make a positive difference, especially if you live and/or hunt or shoot in colder climates.
Magnum primer's increased brisance will assure that ignition is more consistent under all conditions. If you work up the load from start, there will be no downside to using magnum primers.
US military small arms ammo uses magnum primer equivalent cup charges.


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