HI all,
I tried a Round Robin OCW test yesterday on a new load for my .223 JP AR-15. I already have a good load for it now with XBR and 77 SMKs. But I wanted to work up a Varget and TAC load as I'm running out of XBR and it seems unobtanium at the moment, but I've got lots of Varget and TAC on hand. I'm not new to reloading, but I wanted to try the OCW method that is all the rage. I read Dan Newburry's page and followed the instructions to the letter to determine the powder starting charge and the increments. So here are the results.
Varget load w/ 77SMKs with 5 steps
TAC loac w/ 77 SMKs with 6 steps. I had to use the fouler target. But I did shoot a set of foulers on another target with TAC to get the barrel reset to the new powder.
These were all shot in a round robin style just as the OCW instructions suggested.
My previous method of finding the "node" was to shoot 5 shots groups @ 100yds of each powder step over a chrono and compare group size and ES/SD and then go back and reshoot the ones that looked to shoot well adjusting the seating depth up and down. It always seemed to work well for me in the past. I understand that the OCW method uses neither chrono data or group size to decide on the OCW, so I'm totally confused as to which of these groups the OCW camp would choose and more specifically WHY?
Thanks in advance.
I tried a Round Robin OCW test yesterday on a new load for my .223 JP AR-15. I already have a good load for it now with XBR and 77 SMKs. But I wanted to work up a Varget and TAC load as I'm running out of XBR and it seems unobtanium at the moment, but I've got lots of Varget and TAC on hand. I'm not new to reloading, but I wanted to try the OCW method that is all the rage. I read Dan Newburry's page and followed the instructions to the letter to determine the powder starting charge and the increments. So here are the results.
Varget load w/ 77SMKs with 5 steps
TAC loac w/ 77 SMKs with 6 steps. I had to use the fouler target. But I did shoot a set of foulers on another target with TAC to get the barrel reset to the new powder.
These were all shot in a round robin style just as the OCW instructions suggested.
My previous method of finding the "node" was to shoot 5 shots groups @ 100yds of each powder step over a chrono and compare group size and ES/SD and then go back and reshoot the ones that looked to shoot well adjusting the seating depth up and down. It always seemed to work well for me in the past. I understand that the OCW method uses neither chrono data or group size to decide on the OCW, so I'm totally confused as to which of these groups the OCW camp would choose and more specifically WHY?
Thanks in advance.