Wrong Primers!

[snaketail]

I loaded up some cast boolits and went to the range. My .45 Colt Rossi Rifle normally shoots under 2" groups at 50 yards - but this time the point of impact was all over the pace - the best I could do was a 5" group at 50 yards. Something was wrong so I packed up and went home.

It turns out I had picked up a box of CCI Magnum Primers by mistake and they was giving me erratic results. My standard load is Starline cases, Winchester Large Pistol Primers, IMR 4227 powder and a 255gr RNFN boolit.

Should I just go by a box of Winchester primers or try to adjust my load for the magnum primers (how?)?

M

[GoodOlBoy]

Set the magnum primers aside for use in a new load (trail boss, or holy black) and pickup the primers you KNOW works for your load. To bad you are in Missouri I would be happy to swap out with you.

GoodOlBoy

[fouronesix]

IMO- just get some standard primers and set the magnum primers aside for when they are needed… like big charges of ball powder or true large capacity cases.

[snaketail]

Rather than reinvent the wheel I bought another brick of regular Large Pistol Primers. The cases that I had already primed with magnum primers I use to shoot some old rubber "Target" bullets in the basement...minimal accuracy at 20 feet, but a fun way to use up the magnum primers. I'll save the rest of them for some project to be named at a later time.

Thanks,
Michael

[Tatume]

Shooting primers indoors contaminates your home with lead.

[bobby65]

Tatume is the lead in the primers?

[M-Tecs]

Unless labeled as having 'lead free primers', the primary explosive agent in primers is lead styphnate. http://en.wikipedia.org/wiki/Lead_styphnate

[snaketail]

I removed all the Magnum primers and replaced them with standard primers. Guess I'll find a use for the magnums some day.

M

[leeggen]

Snaketail, if nothing else use the mag primers with some glulets. You only need the primer to shoot them.
CD