Switch to 2206H for your 75gn loads (my max 75 Vmax load is 49gn to get an averaged 3746fps ), solid velocity gains over 08. 2209 will be great for the rest, am getting averaged 3152fps with 54gn 2209 for 117 Sierra Prohunters and my SST 117's are getting 3220fps averaged, same load, mine are a little warm though. Been loading for 2506 and .257WBY for over 10 yrs and have all sorts of data, including terminal performance of all sorts of different projectiles, some work better than others, gimmie a shout if you have anything specific. Velocity means everything to a 2506, get as much as you can without risking your action! What is your barrel length?
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