Double rifles... How regulated is regulated enough?

[Just a dude in BC]

So the context is that I lucked into a parks kit for a Krieghoff optima double rifle drilling, two barrels of 9.3x74r and a 20ga. And hilariously it cost a little less than half as much to have it custom finished, vice buying a finished one (Though I opted to finish it matt black with no engraving to give it a very clean look).

Now however, I am regulating my first double, and although the regulation is a little bit adjustable, loading for it has been a bit tough. Having messed with four different powders (N550, N540, Varget, CFE 223) and 4 different bullets (Norma Oryx, Nosler part, North Fork SS, Speer Hotcor) I find that the best I can do is the Nosler partition with Varget. The 55grs of varget is getting me about 2320 fps, and shooting just a hair under an inch at 80 yards. My intent is to use this as my dedicated PG rifle, and shots will be limited to 150yards as a maximum.

So... How far are people going in regulating, specifically how close are your left and right barrels hitting?
Are there any more tricks I should try beyond swapping out powders and loads?

 

[Rare Breed]

Stop sweating it. I have owned 7 DRs. You are good to go and your rifle is ready to go!

 

[AimSmall]

Looks good from here!

 

[AZDAVE]

Those are good groups, load some ammo and go hunt some plains game.

 

[franzfmdavis]

Looks great for 80 yards! Were those off sticks or freehand?

 

[Just a dude in BC]

Looks great for 80 yards! Were those off sticks or freehand?

They were off a rest... I doubt there is many people who can shoot 1" groups at 80 yards free hand!

 

[Hunter-Habib]

I wouldn't worry if I were you.

 

[Backyardsniper]

Roll with what you have. My 470 shoots around 2" maybe a little less at 50 yds and it is plenty accurate out to 120-130 yds. Take the powder and projectiles that would spend chasing a slightly tighter regulation and spend them practicing with that load. Learn the gun. You'll love it, I hunt almost everything with mine, even whitetail here at home.

 

[Kevin Peacocke]

Agreed your double is shooting accurately enough.

In engineering we talk about degerrs of freedom, and to get a double to shoot both barrels to the same point and that point to also be the point that you are aiming at is a very tall ask, like herding cats. I really don't believe you have that freedom unless you can easily adjust both barrels, and that is not easy unless the double is specifically made to allow that. Specialist regulation does that on fixed barrel guns, but it is a complicated process. I spent an awful lot of range time with the loading room 10 meters away and the chrono out front learning that. Eventually I got the impacts to almost touch at 70 metres, but about 4 inches high and right. Solution? Fit a red dot and dial that back to the bull. Job done.

 

[GuttormG]

What you feel comfortable with!


Not to brag but my little French 9,3 shoot like this