I've used 20g Vmax (I reload with H4198) since I bought my CZ527 24" new last year. They have proved very accurate and I'm continually impressed with the performance of this little calibre. I reloaded a small number of 25g Vmax recently (H4198 is actually a recommended powder for this bullet) and was surprised to find groups were even tighter than those with the 20g. I have a few tubs of H4198 and was wondering if others are using it with the 25g and, if so, I'd be interested to hear what loads you're using and details of the performance you're getting.
