I use a 30-06 for my long-range target shooting. I shoot a 190 SMK in front of 56.2 grs. of H4350. Not sure how far off the lands, they are 3.385 OAL (to the tip of the bullet). I have not tried anything else yet. This was the load that the guy I bought the gun from used. I shot a 6 inch 3 shot group at 1000 yards the other day and it shoots 5 into 1/2 inch all day long at 100. I know this wasnt the exact data you were looking for, but just though I'd thow in my .02 worth.
Gene Cole III
You guys using the 30-06 for a target rifle: There is a guy that posts on snipersparadise.com that has used a 30-06 for his 1000 yard rifle for a long time. He absolutely swears by RL22 under a 190 grain SMK with lapua cases.
"Buzzards gotta eat, same as worms" - Josey Wales
All of those are great loads "because the 06 has a spread of loads and because it is a great weapon". I am currently using varget and w852 because i have large amount.
The issue is that i can find a load from these that my 06 likes. I will be patient and find it. My 308 likes varget powder from 125gr to 168gr. Bullets. These are for my benchrest loading.>>>chaz