Home Forums Hunting & Shooting Combination Guns and Drillings Question #1!

it sounds about right. IIRC, my Heym is a tad over 14". (I'm 6'0" and 165# and it was fitted). If you're serious about it, I could measure LOP exactly and you could guesstimate your fit from this:)

The Chapuis were usually regulated for the Norma 232 Vulcan ammo. You might have to fiddle with loads a bit to find a recipe for the 286gr ammo.

If it was regulated with the 232 and the scope attached, which is very important, heavier bullets would spread the shots wider and upward.

Yeah, the 9.3x74R is a rimmed, larger version of the 9.3x62. The larger case allows it to reach the same velocities as the 9.3x62 at lower pressures, handy in break-action guns.

The weight with scope is actually a little lighter than some 9.3x74R doubles I've seen. Mine weighs an ounce over 8 pounds without scope.

The LOP is often a little longer on European rifles, partly so it can be adjusted for the individual shooter. They're not as much into one-size-fits-all over there.

You could have it shortened, but that sometimes affects regulation--as does taking the scope off.

My own 9.3x74R double is a German gun from before WWII. It didn't have a scope on it when I bought it (a lot of pre-war guns don't when they end up over here), but it did have bases for a scope, plus excellent iron sights, including a folding tang peep. It regulated perfectly with the load I use in most 9.3x74R's, 65 grains of H4350 and a 286-grain bullet. Muzzle velocity is right around 2400 from the 25" barrels, and four shots (two from each barrel) go under 3" at 100 yards, which is pretty damn good. Luckily, the rifle not only does that with every 286 I've tried, but 270 Speers as well.

Then I decided to see what I could do about a scope, so filed some Talley steel rings to fit the rifle's bases and mounted a 2.5x Leupold. The rings worked fine, but the rifle wasn't regulated anymore, the two barrels shooting about 5-6" apart at 100 yards. The standard way to cure that is add powder, but I'm at the pressure limit for the round with the load used.
Someday I may dink around with it some more with the scope to see if I can come up with a load that regulates, but I like hunting with the irons anyway.

But any change in weight in a double rifle can change regulation, especially in lighter rifles.

It probably is regulated with the scope. Most modern doubles of any chambering smaller than one of the big African cartridges are scoped. 9.3x74R's usually are, since they're typically used in Europe for driven boar shooting, plus red stag hunting. The original scope might not have been a 4x Leupold, but if a Euro-scope was originally mounted it was probably on the smaller side anyway, due to the usual intended use of such a rifle.

You're probably going to handload for it anyway, so regulation probably wouldn't be a big deal. Though with double rifles you never know!