My results won't necessarily carry over to your rifle but it should give you some idea of what to expect.Īll these loads are well under the max loads for these powders according to the Sierra and Berger manuals. Here are the results of some of my loads to answer your question. With the 52 grain Berger bullets I could actually the overall length deeper but that was because the bullet bodies and tips are longer. With the lighter bullets, there isn't enough bullet body to keep a caliber length of bullet in the neck and get anywhere close to the chambers. 223 bolt actions have pretty deep chambers based upon measurements of 4 different bolt action rifles (2 Savages and 1 CZ). Seating depth depends upon the bullet but the recommended depth seems to work pretty well in my CZ 527, at least for Sierra Match King bullets. 0569 overall but outperforms H335 which averages 0.695 overall. With 55 grain Sierra # 1360 bullets - H4895 averages.

My rifle has preferences for powders depending upon bullet weight - H4895 only averages 0.484 overall with the same 52 grain Bergers and 0.443 with the Nosler 40 grain BTs that shoot so well with H335. (wind really blows those light bullets around). Nosler BT 40 grains average 0.416 across all the loads (2nd best overall) but only managed a 0.365 with its best load. That is the best overall average so the load is relatively consistent across velocities and seating depths. Sierra Match King 52 grain bullets with H335 powder average 0.414 across all the loads I tried but the best load with 52 grain SMKs only averages 0.305. All the groups with the 52 grain Bergers with varying velocities and depths average 0.441 (3rd best) but the best load average is a really nice 0.206 (the best overall). Nosler Ballistic Tip 40 grain bullets also are among its favorites.Īt 100 yards, the best bullet load average measured with my for my rifle is the 52 grain Berger # 22408 with H335 powder. I find that H4895 yields a bit better accuracy than H335 with the heavier bullets.Ħ9 grain bullets shoot pretty well but that surprised me because my rifle really likes 52 grain bullets the best of all. The 69 grain Sierra # 1380 bullets using H4895 powder average 0.499 with a best load of 0.378. The average group size across those groups is 0.533. I have shot 1137 measured groups with that rifle with bullets weighing from 40 grains to 77 grains. I have a CZ 527 Varmint with the Kevlar stock with the 1:9 twist.

Sierra 69gr match king load data