Henry Rifle Forums

Did a OCW 57-60 gr H4198 Win LR Mag Primer trimmed 2.095" Moderate crimp

gr fps 100yd group "
57 2260 2.1 SD- 16
58 2295 2.5 SD- 19 vertical string
59 2324 2.2 SD- 14
60 2357 1.9 SD- 13

No significant signs of pressure. Primers were all flat, noticeably flatter than my 63 gr 8208XBR loads which were 2050 fps and the tightest group.

Well that should equal or outdo the 405 Winchester in power. Flattened primers are a pressure indicator. I can imagine they had a good kick to them.