Got myself a Hornady OAL gauge at the Deer Stalking fair on Sunday. Never used one before.
I started by doing trial measurements to get used to using it. This was obvious by results varying by .009".
After I was getting measurements with less variation (.004"), I started 22 measurements. I removed the highest and lowest leaving me 20 measurements which I averaged.
The result for my .243 was an OAL of 2.668".
Beforehand I had been seating to 2.700" so the head must have been into the lands by
I had previously worked up a load to max with no over pressure signs although the best accuracy node was a relatively soft load.
I'm going to seat .010, .020, .030 and .040 below the 2.668" to find the best grouping.
Does this all sound ok and can I, once finding the best OAL, then start on working up the load again to find a slightly higher velocity load as at the moment velocity is at 2780fps.
Any advice appreciated.