223 primers

[roundss]

Thanks guys. I was pretty sure that the primers didn't have as much of an issue as the powder I just thought one might act better than another in specific weather.

[roundss]

Originally Posted by magicofmt

Pay the little extra and get the CCI BR 4 primers, you can't go wrong there.

I picked up 1000 at Cabelas today.........pay no tax today or tomorrow at the one in Lacey, WA. So I picked up the primers, some 40 gr v max moly, and some 90 gr bullets for my 270.
I told my wife the more I spend the more I save. She didn't understand

[linksmechanic]

I like the cci primers but I think there price is a little high compared to federals so I use federal.

[keithcandler]

when dealing with super accurate custom guns. Funny how a particular powder will love a particular primer to get those little tiny holes in the paper.

Rem 7 1/2, CCI BR-4's, and CCI450 all have thick cups, and in my loads the CCI450 is the hottest, but is not always the most accurate.

I'm a new convert a couple of years ago on Vit N-133 with the 40's & 50's, and Vit N-135 for the 55's. Out of my 26" Hart barrel, I can get 3900-3950 out of the 40g NOsler BT putting all the bullets into a tiny hole. With the 50's, using the 133, I am getting 3600-3635 out of the 50's, into the same very tiny groups, and with the 55's with the 135, I am getting 3550 with groups less than .300.

All of these loads are high pressure loads but will not require full length sizing of the brass, but will demand a thick cup primer.

I use IMI and Lapua brass with a minimum SAAMI match chamber with a .250 non turn neck with .2245 thoat and 1 /1/2* leade angle in 14 twists.

When I was playing around with the loads, some loads with the 133 had a slight edge with 7 1/2's while others liked the BR-4. All of these groups were in the .185-.250 range shooting Nosler BT bullets. The groups opened up slightly with the 450's, but not by more than .030.

Win and Fed 205's have very thin cups.

If I were shooting in super cold weather, then I would use the CCI450 or the 7 1/2 in that order. Remember that in temps of -25* and colder, pressures can spike!

[Dan Carey]

"Remember that in temps of -25* and colder, pressures can spike!"

Why do you think that?