My 7mm bee is a sako action w/ a pacnor 24" 1-8" twist barrel. I'm still in the process of working up loads.
It does seem sensitive to oal length and has shot widely varying groups with small changes in oal.
I am concentrating on 150 gr bullets and some show promise shooting groups from 7/8" to 1- 1/4" I'll start tweaking these loads as soon as the weather gets better.
Heres some info on loads
150 gr. nosler E-tip w/ reloader 25 oal 3.400 vel. 3204fps
145 gr barnes ttsx w/ reloader 25 oal 3.360 vel 3260fps
150 Hornady GMX w/ hogdon H1000 - oal 3.450 vel 3180fps
Fed 215primers used in all. None of these loads are max. this sako has a 3.600 mag box
All these mono bullets seat to different lengths due to the placement and amount of grooves in the bullets
Reloader 25 and H1000 seem to work really well with 150 gr bullets giving good velocity and low SD.
Load development might be simpler with flat based bullets as Muledeer says, but you probably can get there with boattails if you don't mind tinkering.
