thank's everyone for the help
last week i tested this load a bit further.
here is the three 5 shot groups i got using 25 gr and a coal of 2.300 as in the ocw test.
the first pic that have 2 holes on the left and 3 on the right was the last group i shot. a young gentlemen shooting next to me noticed that i was not consistent in my grip. and told me that some shot i was wrapping my thumb around the grip, other times i was putting my thumb on the back of the grip.
so for the last 5 shot, i tried 3 shot one way and 2 the other. i guess he was right.
it's nice to have someone watching. it helps pick up things i was completely unaware i was doing.
it's pretty new that i go to a range. i was shooting alone on my uncle's land before.
but i really like meeting experienced shooters
i tried also at 2.290'' and groups enlarged in the .75" range
at 2.280 it went in the .80-.90''
i also tried just a 5 shot group at 2.260 that went 1.1".
so i guess until i can put my hand on other brand of primers i will shoot some more and try to improve the driver it may help more than messing with the load
but i will sure try melloyello's advice and try 25.6 to see if 25.3 might be better.