I just came across this thread. I’ve had nothing but trouble with this round and also the cz527. If it wasn’t for the money and time I’ve spent on this project I’d have given up long ago. But this thread looks like I might be able to get a better handle on this round.
I’ve only been able to get around 1.5 moa and that's with factory 20 & 25, 20, 25 gr Vmax, lilgun, and h4198. All the above combos and the only consistency is 1.5 moa. Lots of ruined cases from over pressure which I thot might be soft Hornady brass bc I thot published info had to be accurate. Error. At least according to your above info.
I’m also going to try to adjust out some of the after travel in the trigger as past experience has showed me that can be detrimental.
Thanks for the encouragement guys, I’ll give this thread a more thorough going over and apply some of your findings.
What I’ve learned on this thread so far is that I have (correctly) been using SR magnum primers fr cci which is likely why I didn’t detect overpressure. I like the Hornady dies cuz of the drop down which holds the bullet in place while seating. I have had a lot of trouble eliminating case runout, and am not sure what to do about that yet. I’ve already gone through 100 Horn cases and was hoping new cases might help that problem.
I’ve also experienced a wide variance in empty case weight with Horn factory rounds. Not so much with Horn brass.
Also the small .17 is very fussy on keeping the barrel clean. Groups open up very quickly fr 1.5 to 4 moa if allowed to foul. Can’t remember the # of rounds to produce this but it does happen much quicker and also much more suddenly than other calibers.
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