BL-C(2) with a SRM primer help?

[Rabid]

Never reloaded for 223 before because there was no cost savings but i think it is time to eat through my components for 223.
I have BL-C(2) ,CCI #41 (Magnum) primers, 55gr Hornady FMJ and Nosler 55gr B-Tips.

Speer seems to be the only one with magnum primers for BL-C(2) and a lot of my older book show Rem 7 1/2. I can not figure out if the Rem 7 1/2 is a magnum or standard primer. I have seen them in different charts being either or. I know the Rem 1 1/2 (SP) and 5 1/2 (SPM) are the same priming mixture with the 5 1/2 having a thicker cup so that just adds to the confusion.

The starting loads seem to range from 23 gr to 25.5 gr with CCI SRM and Rem 7 1/2 primers with some of the max loads with the Rem 7 1/2 falling before 25 gr.

Has anyone loaded with these before? Any help with all the conflicting data would be great.

[jerrymrc]

I never worried about finding a load using the 41's over the std primers. For me it works out to about a grain less in .223. Where I like the magnum primer these days is loading SS for 300blk. Gives me a little more room to work with.

[Great-Kazoo]

7 1/2's are standard primers , not magnums.

[Zombie Steve]

Do your load development as normal... start low, work your way up checking for pressure signs. Just be mindful that you'll find max sooner than your manual tells you. It probably won't change anything on the low end, but you'll get a more steep pressure curve towards the top.

[Rabid]

Thanks for all the replys.

[XC700116]

Like Jim mentioned the 7 1/2's are Small Rifle Bench Rest Primers which are pretty much the std one with a stronger cup and supposedly more consistent. I use them quite a bit and have noticed no real differences in end use performance or pressure signs. However the stronger cup may make reading early/less drastic pressure signs a bit more difficult.

That said, just back your starting load off a bit more than usual and keep a close eye on things approaching max loads a bit more carefully.