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4/19/2012 4:39:05 PM EDT
Ran out of my Remington 7 1/2 SR primers tonight while loading up a bunch of 75gr 223 rounds for high power this weekend- had to use primers from my plinking stash: Wolf REM 223 SR primers.



Any idea how much of a shift in POI there will be at 200/300 Y assuming everything else is constant?




(LC Nato Brass, 20.9gr 8208XBR, 75gr HPBT Hornady Match)
4/19/2012 4:40:31 PM EDT
[#1]
Depends on the gun.
4/19/2012 4:50:56 PM EDT
[#2]
20" DPMS AR15 A2 service rifle
4/19/2012 4:51:22 PM EDT
[#3]
It still depends on the gun.
4/19/2012 4:51:49 PM EDT
[#4]
haha. guess I'll have to shoot and see


4/19/2012 4:52:54 PM EDT
[#5]
4/19/2012 5:39:16 PM EDT
[#6]
Just no way to know without rounds downrange. Sorry.
4/19/2012 5:47:23 PM EDT
[#7]
np, without knowing exactly how much a shift there will be- is it likely that I would see at least some vertical shift?






different primers such as the wolf vs remington, roughly equal to half a grain powder difference or a grain?







ETA": Or... I could just be smart about this and use only wolf primered rounds so I don't have to worry about a random shift in the middle of a course of fire

 
4/19/2012 6:19:02 PM EDT
[#8]
Yeah, changing primers is bad juju in the middle of a course of fire, but hey, you get sighters, so it's not that big a problem.
4/19/2012 7:06:50 PM EDT
[#9]
If you would like a guess based on my own experience with exactly the same changes, while using a WOA service rifle.....
Not much difference in POI and not much difference in dispersion either.

About two clicks was all I needed between those two primers. Be interested in hearing how yours turn out.
4/19/2012 7:15:38 PM EDT
[#10]
I compared Wolf SR223 primers with CCI400s and Rem 7 1/2s using SMK 77s, and 24.0 gr. Varget.  



The CCIs and the Remmys chronoed to the same velocity, and the Wolf SR223 gave 35 fps more velocity with a lower ES and SD.




YMMV.
4/19/2012 8:04:44 PM EDT
[#11]
There's no way to predict, I doubt if it will be a lot, but you don't know till you try it out.
 
4/20/2012 9:09:45 AM EDT
[#12]
I did side by side testing with the wolf and remington 71/2 primers and found no point of impact shift in my weapons.
4/22/2012 9:36:29 AM EDT
[#13]
Ended up being able to shoot the 200 slow & rapid, and 300 rapid using just my Rem primered rounds.



Got to the 600 Slow (simulated @ 300 w/ reduced target) and after the 2 sighters and 4 rounds, had to switch over to the wolf primer rounds. Interestingly enoughly, no noticeable change in POI. At 300Y, I would consider myself having a good day if I can hold the 9 ring consistently, so it seems that any change in POI between the REM and WOLF primers is less than my shooting ability.
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