I have a Husqvarna 270 with a 23.5 in barrel.
I will be shooting 140 grn boatails & IMR4350
A friend has 10K Fed215 primers.I'm thinking
of loading a charge of 50 to55 grns...depending
on pressure. My question....will the mag primer
cause inconsistent pressure? My barrel is .582
at the muzzle and does'nt seem to like slower
powders

I have been using Fed GM215M primers for my 270 loads with no trouble. I have used 7828SSC, 4064, and 4350 powders.

I cannot remember which of my reloading manuals I read this in, but one of them has a story in the 270 introduction where the author recommends always using a magnum primer in the 270 for optimum results, especially with the slower burning powders.

This could make a positive difference in your rifle.

The key is to always start off with the min. charge and work up, while monitoring pressure.

I myself have never bothered trying them since I've had excellent luck with standard large rifle primers.

You won't know about accuracy until you try the load, but other than an extremely slight probable increase in velocity (and corresponding and likley undetectable increase in pressure) as compared to a "standard force" primer, you won't know the difference in this and any other primer.

If you already have a max load using standard primers, it has been my experience that you'll have to reduce your powder charge when changing to a magnum primer.

As with anything else, some people like setup "A" others prefer "B". I personally see no need to use a magnum primer for the amount of powder held in a .270 case, but others may think differently. In reloading, there are always many ways to skin the cat...

- mike

The only way you'll know if they work is to load some and try 'em out. Magnum primers are not "needed" for a 270, but if they do what you want, why not?

quote:

Originally posted by Sagebrush Burns:
The only way you'll know if they work is to load some and try 'em out. Magnum primers are not "needed" for a 270, but if they do what you want, why not?

That's exactly right. I've found some magnum primers are not hotter than some std. primers. If you have a load already worked up, reduce your charge 1gr & work back up. You may or may not find accuracy decline or better.

quote:

Posted 08 February 2008 08:17 Hide Post
You won't know about accuracy until you try the load, but other than an extremely slight probable increase in velocity (and corresponding and likley undetectable increase in pressure) as compared to a "standard force" primer, you won't know the difference in this and any other primer.

as usual stonecreek knows what he's talking about

Full agreement here... I have never loaded mag primers in my .270, but have no reason to believe they would "muck up anything". Magnum primers are typically used for powders that have heavier coatings of deterrent and as a result are harder to ignite, or are used in extremely cold weather. I shoot guncotton based powder (Accurate Arms 3100), and don't need the extra spark.

But having said all that, back down, try the mag primers with the same powder and work back up!

And let us know what the outcome is. I (for one) would like to know...

For me, it is not the cartridge, it's the powder used. I draw the line at IMR-4831. Std primers for faster powders and mag primers for slower burning powders. It's all about adequate ignition reguardless of burn rate or abient temps.

Switching to GM215M primers from standard GM primers cut the groups on one of my .270s (Browning) by 1/2" and made no improvement in another .270 (Remington). Every rifle is unique and you'll never know if it will improve it unless you try.

I swear by em..I made the switch years ago and never looked back. IIRC the rule of thumb is drop a grain and a half from a max load when you go to the fed LR mag primer. I use em over a large charge of IMR-4350.

Lostone,

What I find exciting about your post is that you have a friend with 10,000 Federal 215 primers. Whether you use large rifle or large rifle magnum is no big deal, the important point is that you need to acquire as many of those primers as possible without offending your friend. If you haven't yet noticed, Fed 210 and 215 primers have been very hard to find for the past year or so. If you like Federal primers, then you would be wise to stock up.

It's been my experience that you will get better accuracy with a standard primer..I use Fed. 210s..Perhaps with a ball powder you might get by a little better with a magnum primer but I doubt it...but if it works for you then use them.

Thank you for your replies. My old load for the
Husky was with George Leonard Herter's Model Perfect Primers & his 101 powder. I ran out of
those last year and am now searching for a new load. I went with the 4350 for a little more bulk in the case. I've tried 4831 in the past
with disappointing results. This rifle will shoot .5groups sometimes, usually .7or.8
Wish I coulda' got a hold of one of George's Triple Neck Terror cartridges in 270 Ram Magnum. He said it was a cartridge of the future....little used today.

Have been using Remington Magnum Large Rifle primers in my .270 for at least 20 years.

LLS

My .270 Win. load consists of Fed GM-210 match primers, Rldr-22 powder and a 150 gr. Partition. Always under an inch, more often like 3/4".
Bear in Fairbanks