I have been using Ginex primers for a number of years with no complaints. I have used SR, LR, LR 7.62mm, LR magnum.
Ginex is a sophisticated primer manufacturer based in Bosnia. Unless Bill Clinton sent you there to bash the Serbs I doubt you could find it on a map to save your life. Helpfully, the Ginex home page has such a map.
https://www.ginex.com.ba/index.htm
The products page has a drop down box that lists every primer they make. These guys even make a primer specially for the .38 Special.
I have never had a problem seating Ginex SR primers, and I've used a few. The LR varieties I have are a tad larger, it's right in the box 5,5mm. I find it useful for extending life of cases as primer pockets grow. Most cases won't give you a problem though. Forget it with my IMI 308Win match cases, which will only accept Winchester or S&B primers for the first two loads or so. But other cases? Not so much.
Especially in the LR primers, I find Ginex often gives me lower ES than other brands. Chacun a son gout.
Now: On size in the LR varieties: If you click on the drop down box on the Products page, and then click an individual primer, Ginex offers a detailed specification sheet. I've attached the one for SR.
One small thing I like about the Ginex primers I have is that each 1,000 count box has a signed inspection sheet actually signed in ink by a human. But then I'm old-fashioned.