Different primers question

DallyB09

FNG
Joined
Nov 30, 2024
Messages
10
I found a load that my rifle really likes.

56 gr H1000
Berger 156 eol
CCI LRP primers

Problem is I can’t find anymore primers

I did get a box of Winchester LRP. Do I just load em and go? Or do I need to re “work” this load”
 

Harvey_NW

WKR
Joined
Feb 13, 2019
Messages
1,965
Location
WA
IME, different primers may move the avg velocity needle a little bit. Otherwise, I've never seen a noticeable effect on precision with decent sample sizes. If that charge is near pressure signs it may be worth shooting a quick pressure ladder to make sure it isn't too spicy with a new primer. Then I would load 10 up at a safe charge and go shoot a group over a chrono to check velocity data. If you don't have one just shoot the 10 to make sure it's acceptable and load the rest and true up at distance.
 

06 SB

Lil-Rokslider
Joined
Mar 19, 2024
Messages
131
Location
AL/GA Line
Winchester LRP are much hotter than CCIs. ALWAYS work up loads. As an example with these two primers, I have a 338Fed and always used CCI LRPs with IMR4895. I was looking for a little more consistent velocities so I bought a sleeve of Win LRPs. I reduced the load from 47gr to 45 figuring that was enough. The 45gr load was hot to include a stiff bolt lift, flat primer and ejector marks. I just stayed with CCIs.
 

A382DWDZQ

WKR
Joined
Dec 3, 2021
Messages
752
For changing lots of poweders, brass, bullets and primers, I like the method where you don’t wait until you run out, and then you load a backed off load with the current components and a backed off load with only the new component, and see if those line up on velocity, or what the difference is. Then, if I feel necessary, I’ll do pressure ladder, or if not, duplicate the normal load and see how it shoots/chronos.
 
Joined
Mar 28, 2020
Messages
968
Winchester LRP are much hotter than CCIs. ALWAYS work up loads. As an example with these two primers, I have a 338Fed and always used CCI LRPs with IMR4895. I was looking for a little more consistent velocities so I bought a sleeve of Win LRPs. I reduced the load from 47gr to 45 figuring that was enough. The 45gr load was hot to include a stiff bolt lift, flat primer and ejector marks. I just stayed with CCIs.
That wasn’t the primer, something else was going on
 

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