I've been using Russian primers from the start, that meaning to include all different "brands" since inception, KVBs white box, PMC, and now Wolf. They are all the same.
A common "issue", if you wish to call it that, is the apparent requirement for complete attention in performing a "perfect" seat. No horsing around here. The primer needs to be seated in properly, and always equally. Leave one sticking out just a tad, and it may cost you a point (or two). On the other hand, sit them all properly, standardize, and you will enjoy the outcome of your added efforts.
For a competitior, there are two schools of thought, one being no time to fool around with unknowns, and the other being it is all very well worth the extra effort. You will be the one to choose.
A friend of mine (JP) and I obtained a good amount (50,000+)of these primers when they first arrived, and immediately found the need for a new and proper seating technique. Most important, and I dare to invite all to see it my way, first, it opened our eyes in understanding what a deficient job most reloaders perform during this step of the process, and second, rationalizing the existence, of a minute posibility, of extracting even better performance from any existing primer.
I believe that many reloaders have taken this step for granted for many a long year, mostly due to the forgiving characteristics of existing primers, and therefore been able to "survive" it. The Russian primer will penalize you, hard and harsh.
I have been experimenting for a year now with several primer lots from different manufacturers, and have noticed that there is little difference in SDs when primers are seated with same zealousnes.
At the end, several calibers are more appreciative than others, ie: 6BR vs .223, where the six will return an even smaller group, compared to the .223 when using a Wolf vs Winchester WSR. Go figure.
At the end, I decided that the extra effort pays dividends, and taking in consideration the company I find myself in, where dropping one point can place you on the second page list, and just one X difference can cost you first place, hmmm........
Just my 0.02
Andy