Primer for 300 win and reloader.

[pbonura]

Looking to work up some loads for my zastava 300 win with hornady interlock 180 and reloader 22. So what primers do you recommend. Looking at cci. May shoot in the summer for bear and November for deer. Should I go with a magnum or regular primer.

 

[trykillthis]

Just large rifle is fine. That is what I use.

 

[RSA1]

The common reloading manuals show Magnum primers for the 300 Win Mag, especially with slower burning propellants. The Speer #14 manual obviously recommend CCI250, the Large Rifle Mag primer, which is also what I prefer to use in my 300 Win Mag, 300 H&H mag and my 300 Ruger Compact Mag.

Also remember the general idea that a cartridge using 60gr or more propellant, will give better, more consistent ignition with magnum primers, especially if you hunt / shoot in colder weather.

 

[mossyhorns]

I use magnums in my 300 and RL 22 but to be fair I have never tried large primers. Maybe they'd be fine but it shoots tight with magnums so I see no reason to switch. If you only have large primers load some up and try it. If it shoots good leave it be. If not then no harm trying magnums. Of course start low and work up

 

[horseman2]

Use large Rifle Magnum primers with Slow Powders, when exceeding 50 grains of powder, ball powders, and for large/long cases. They will not hurt anything under the above criteria.

 

[brobones]

WLRM is the only primer to use.

 

[LUTNIT]

I use CCI large rifle magnum in my 300WM loads. I tried some with CCI large rifle (non-magnum) to see if it make a PoI difference and I didn't notice anything. Perhaps it would make a muzzle velocity difference but I didn't have a chrony out that day.

Also note that the flame intensity and duration is different with the same type of primer from different manufacturers. I've had Winchester primers (non-magnum) have a hard time igniting very small powder charges in larger cases (cast bullet plinking loads). They seem to want a certain powder density before they will ignite. I've never had any problems with this from CCI non-magnum primers. For reduced loads you generally want to use magnum primers because there is less powder present but since non-magnum CCI primers worked fine I thought I'd try non-magnum Winchester primers.

 

[Northman999]

I use CCI #250 magnums in my 300.

 

[BigUglyMan]

I use magnum primers...CCI 250 or Federal 215. I also use magnum primers in things like my 30-06 and 9.3x62 due to the cold temperatures during hunting season.

 

[c-fbmi]

Use large Rifle Magnum primers with Slow Powders, when exceeding 50 grains of powder, ball powders, and for large/long cases. They will not hurt anything under the above criteria.

This is the criteria I adhere to as well, sound advice.

 

[RSA1]

Hi Pbonura,

I can give you a box of #100 x CCI250 LRMag primers if you would like to try them. Also, I have my chrony running well at both BRRC and Silverdale, so I can help you to chronograph your loads.

You have my contact details.

Regards,

RSA1

 

[pbonura]

Email sent.

 

[dthunter]

I use CCI250 primers. I tested Rem,Win,Fed & CCI for which primer gets the lowest standard deviation in my rifles.

CCI250 primers seem the best for me. YMMV

 

[Budweiser2]

primers

cci 250 mag primers is all i use for lge cals.