op, are you using berry .310 plated bullets? I ran these as well, keep in mind they are not jacketed bullets and not recommended to be pushed over 1900fps.
There is a gentleman go by the id 'armoredman' who had great success with this projectile. Search internet for his post on various forums.
For me I had absolutely no luck with it in my cz527. I've tried 1680, 4198, 4895, CFE BLK, H335 on this bullet, all of them gave very poor accuracy past 25 yards in my cz527. Only success I've had was with trail boss in both x39 and x54r. I get around 1800fps from mosin and 1500fps from cz527. Otherwise I use them to replace the projectile in surplus ammo for my indoor range (where accuracy beyond 25 yard is not an issue).
Good luck on your venture and hopefully your rifles likes the berry pill better than mine.