When I got my Hatsan 95 with walnut stock, I was thinking that this artillery hold was a crock of tootsie rolls. I tried firm holds and loose artillery holds. I even tried changing up how I shouldered the rifle with a tight butt pressure and loose pressures.
I determined after some time with what shooting I've done so far that my 95 likes the artillery hold with a loose, but not slipping shoulder pressure for the rifle to shoot its best at this time.
I haven't tried bench shooting yet with this rifle, so using shooting bags may also be the same as using artillery hold, as the constant downward forearm pressure should be the same.
Apparently the rifle likes to slide back naturally during recoils, rather than being forced to absorb the recoil from its stock attachment screws, factory bedding and powerful spring action from any tight holds. Now, the barrel still isn't broken in with only around 100 rounds, so this method may even change over time as things wear-in to each other.