maybe loading up some loads in .1 grain increments from 44.5 - 45
When I first start developing a load for any gun, I usually go in .4 grns increments! Usually on the lands.

When I get a close group, then I will load by the tenth. If I am shooting VLD's i usually go into the lands, SMK's are different, some of my best smk groups are .015 off the lands.

Below are some of my groups, sounds like your gun is close to mine!

Try some on the lands, and try some .015 off. I have never had any luck with SMK's in the lands! BERGERS, YES!

Note the one I marked "to hot", don't forget to look for pressure signs with every shot!

[img width=600 height=450]http://i957.photobucket.com/albums/ae56/Dennis4437/175SMK435VARGETBEST.jpg[/img]

Notice below how .2 grns opened the group up! Above 44.0grns of IMR4064 is on the hot side for my gun!

[img width=600 height=450]http://i957.photobucket.com/albums/ae56/Dennis4437/175SMKIMR4064.jpg[/img]