Anybody using Winchester 777 primers?

[ADVWannabee]

I had read that some people felt that traditional shotgun primers may be too powerful and actually get the bullet moving before the powder fully ignites so I switched to the 777 primers. I don't see too many people here talking about primers, maybe that is because they don't really matter? So I thought I would ask, for Pyrodex pellets, does it matter what primer I use? Has anyone noticed a difference in accuracy between types of primers?

[Muley Hunter]

The T7 primers should work fine for everything but BH 209.

[Breechplug]

I sometimes use the T7 Primers with Pyro Pellets and they work fine. Now I cant find the chart that Sabotloader sent Me but there is a big difference in Primers as to there Length and Velocity, mabey He'll see this and Post it.

[corey012778]

I am using using t7 primers this year. namely because I found with the sit up I am using, the primer allowed better groups. but I only test 4 out of what 7 primers out there

[MountainDevil54]

Yes primers make a huge difference in accuracy. Some powders simply want a certain primer for best accuracy.

[pluckit]

I use T7 primers and Pyrodex Pellets in my Pursuit with a 240 grain .45 cal XTP and they work very well.

[7.62NATO]

I remember reading a post by Sabotloader where he showed different group sizes with the same load and varying primers, and the differences were negligible. I don't remember if he chronographed them or not, but the groups were very similar and POI did not shift all that much.

[sabotloader]

Originally Posted by ADVWannabee

I had read that some people felt that traditional shotgun primers may be too powerful and actually get the bullet moving before the powder fully ignites so I switched to the 777 primers.

Cecil @ PR bullets has professed this stance and I would have to agree that in some cases it could actually happen, especially if the powder load has degraded, but in normal circumstances probably not a factor. As many people that are now using 209 primers I am sure we would have heard more about this by now. Especially by the folks shooting the magnum primers.

I don't see too many people here talking about primers, maybe that is because they don't really matter? So I thought I would ask, for Pyrodex pellets, does it matter what primer I use? Has anyone noticed a difference in accuracy between types of primers?

You know shooting pellets it might matter - but I am not really thinking it might...

Different POI when switching primers... I would say anytime you switch any component it might switch POI, but I my case I have not found changing primers with a proven accurate load has made a BIG difference...

Here is a target that I was testing primarily to see if the amount of velocity would change if I used different primers. It was not really shot for accuracy but you can see the differences...

[ADVWannabee]

Thanks for the info everyone. I will stick with the T7 primers since they are working for me.

[Muley Hunter]

You would think there's some difference. Why would they bother to develop ML primers if there was no need? All the companies already had primers on the shelves.