The best i can do using the isosocles is an inch group at 20 yd..with Hobby...in .22.
...lots of practice..
I think the pistol could do a bit better ..i just spoil it..
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote!" -- Benjamin Franklin
Army might be a tad different from today's modern stances and techniques in target shooting. I read a dutch army manual once, but its still the same manual since the fifties! While there changed quite a lot in target shooting techniques since than.
Firing a firearm is different from an airgun anyway, especially holdwise. And followthrough is much more important as well.
ATB,
yana