As long as the cartridges and the regulation match for the particular range...Normal driven game range excellent weapon.
I've developed 3 loads that shoot extremely well in the double. One Sierra 175grn load and a 185grn fox and Lapua rounds. A new double rifle or double rifle drilling should come with the info about what ammo it was regulated with. With a bit of time and effort it's not to hard to work up a hand load that shoots well.As long as the cartridges and the regulation match for the particular range...
The o/u double with have vertical POI/POA changes with range off its regulation range. I've no experience of a Bockdrilling, but with one barrel off the to the side I guess it an be regulated to a particular range after or before which there will be horizontal as well as vertical differences between POI and POA for the little rifle - rather like a s/s double, or Doppelbüchdrilling?My experience of shooting a combination gun in 16 over 7x65r, that also has an Einstecklauf in 7x65r to turn it into a double rifle is as follows.
1) the main rifle barrel is MOA accurate provided the barrel is cold and the gun is held firmly and recoil is managed. I am perfectly happy shooting deer sized animals at 200. On the range we have a 5” diameter gong on a roe target at 300. I can hit this reasonably easily, but not well enough that I would take a shot on a roe at that range. As the barrel warms though shots go higher. In practice first shot is what counts, a second shot can be taken quickly enough and accurate enough. But its not a culling rifle.
I am using a 140gn RWS HIT ammo that is flat shooting - think 270win.
8x57r won’t be as flat so you need to take into drops.
2) With The Einstecklauf barrel, it is also accurate and I can dial it shoot close to bottom barrel point of aim. Its more than adequate for 50ish range targets for a quick one two type shooting on bigger animals.
But I wouldn’t use it to take a 200 type shot.
All multiple barrel rifles / combinations where barrels are soldered together will usually shoot accurately enough from one barrel for longer range shots. But how they shoot both barrels for longer range really depends on how they are set up / regulated.
An Austrian friend has a Blaser Bochdrilling - This has a 30 Blaser in bottom barrel, 20 bore top and a 222 on the side. The barrels are free floating and can be adjusted to shoot to same point of aim.
Its mounted with a Swarovski scope with dial able turrets. I have seen it used to shoot marmots at good distances with the 222 barrel and chamois with the 300 blaser.
Probably, but the owner of the bochdrilling likes his dialling so has developed dialling charts for both barrels. It also has a bipod.The o/u double with have vertical POI/POA changes with range off its regulation range. I've no experience of a Bockdrilling, but with one barrel off the to the side I guess it an be regulated to a particular range after or before which there will be horizontal as well as vertical differences between POI and POA for the little rifle - rather like a s/s double, or Doppelbüchdrilling?
Sounds complicated - but if it works for him...Probably, but the owner of the bochdrilling likes his dialling so has developed dialling charts for both barrels. It also has a bipod.
Which shots are from which barrel?four shots from the double at 50 mtrs . Roughly a 2 " aiming markView attachment 339012
Right hand pair from the righthand barrel.Left hand pair from the left hand barrel. When I did the load development I took a photo of the group from the final load .All the photos are on my old computer. I have got the targets for each final load in a folder somewhere but as I moved house a short while ago and am suffering from man flu I have no idea where that folder is lurking.Which shots are from which barrel?
I once saw a side-by-side double rifle at a game fair and was told that the barrels were made to converge at a set distance, 200yrds, perhaps.
The barrels will be set to converge - so I guess that will be at a particular distance.I once saw a side-by-side double rifle at a game fair and was told that the barrels were made to converge at a set distance, 200yrds, perhaps.





Three different loads all have been used on driven days and taken ,boar ,red and fallow plus a fox on the last hunt.I was thinking the same..
If you look at Jagare's 50m diagram,.................A 75m and 100m diagrams would be interesting to see, too!