H335 starting point for 223 rem

[SeabeeKen]

Just because you don't see pressure signs doesn't mean it hasn't reached SAAMI max pressure. Brass flow happens at much higher pressures than SAAMI. Your chrono will tell you when you are near the SAAMI max

 

[timeout]

Just because you don't see pressure signs doesn't mean it hasn't reached SAAMI max pressure. Brass flow happens at much higher pressures than SAAMI. Your chrono will tell you when you are near the SAAMI max

A quality zero to 1" micrometer that reads to four decimal places is your friend. Measure the diameter on each piece of brass at the .200 area as you increase charge rate. As I stated earlier, this is a good time to do a ladder test also. The ladder test is personal preference only.