Double rifle regulation

It does shoot well with open sights, the problem is that my eyes only allow me to shoot open sights while wearing bifocals, which are impractical for me to wear while hunting. I would love to agree, and may still be convinced, but I don't think I can get it to regulate with hand loads with the scope attached. More experienced persons than me have informed me that it is unrealistic to expect a rifle regulated with iron sights to maintain regulation with a large scope attached. The momentum of recoil takes place at a different arc and with different speed due to the added inertia of the scope. The rifle does seem to shoot OK with a 286 gr. RWS factory load and a 286 gr. Lapua Mega that I handloaded to factory speed. But only with the open sights, with the scope attached the two barrels still group OK individually, but a more than a foot apart at 100 yards.

could you tell me which load was used with sako ammo. ill find you the sako load for you.

Phil

Ps: by load i meant bullet weight ...
 
Last edited:
Brybenn, good question, but I don't think interference from how i'm holding it is an issue. I am shooting by holding the rifle in my hands while resting my wrists on pads so I achieve free recoil.

Gatehouse, I did think of a reflex sight, and it's great idea. However, the scope that came with the rifle, A S&B Stratos 1.5-8x 42 w/illuminated reticle, is much more versatile. It can do what a reflex sight can, but also help me reach out a bit or determine where a hole in the brush is to shoot through, or give me a reasonable aiming point in dark conditions. The scope is also worth about $3000 so I don't want to discard that idea.
 
Contact Westley Richards in England. I don't know if they would work on a rifle they didn't make, but the kid they've got doing the regulation for their rifles is a marvel.
 
Been there. Done that. Have the scar to prove it. (My 375 H&H doubled...)

It is probable that there is a load that will superimpose with the scope installed. All you have to do is find it.

First select 1 or 2 bullets you would be happy with. In my case I chose the 250 and 300 gr Barnes X.

Then select a quality powder you trust - say Varget or N-140.

Then load 6 of each, in 0.5 gr increments from Start to Max.

When you shoot, put up pairs of targets, one above the other - representing the two barrels.

Slowly shoot 3 shots at each target, alternating barrels. You might need 50 yard pistol targets to have a piece of paper big enough to catch groups a foot apart. Adjust the sights so that one barrel is hitting 6" right and the other is 6" left.

Fetch the targets, and mark them T (top) and B (bottom) and the load.

Repeat with the next load. It is best to shoot the entire exercise with the same scope setting, so try to start with a decent zero and use big paper.

What you are looking for is a pair of targets where the groups are in a similar place, say, 3" high and right.

If you are lucky, you will find a bullet and powder charge that prints to the same place.

If you are not lucky (I was not) you will have a stack of 20 or 30 targets, with groups in various places. Plan B is to sort through all the targets and find a pair of targets (different barrels) that shoot to the same place. You might find that the 200 gr bullet with 56 gr and the 250 gr bullet with 52 gr shoot to the same place. Now you have ammo that will superimpose.

I used a felt marker to mark my primers either red or blue, to show me which barrel it went in. This ammo printed to the same 2" circle at 100 yards, and I could shoot the barrel first that best match my target (deer or moose - 50 or 250 yards).
 
Ganderite, I respect your experience and wisdom a lot. Thanks for offering it. However, I won't be loading different loads for each barrel, this rifle is meant to be used for international travel, ( Africa, Australia perhaps Argentina) and for large dangerous beasts like buffalo where the quick accurate second shot must be available if needed, and a mix up in loading the wrong ammo in the other barrel is undesirable. As well, being able to shoot common off the shelf factory ammo is important for the dreaded "rifle arrived, ammo didn't" situation that sometimes happens when flying to hunt in a foreign land.
i've made arrangements to send the rifle to J.J. Parodeau, Thanks for all who replied.
 
What is the expectation? what sort of MOA (barrel A vs B) at what range? Double o/u riles are out of my league to play with. What is a reasonable goal for such a gem?

I'm not a "tacticool" guy by nature, but any chance a mil dot reticle with a chart for each barrel would help?
But only with the open sights, with the scope attached the two barrels still group OK individually, but a more than a foot apart at 100 yards.
Nosey guy asks if the POI converge or diverge before and after 100? Do they converge at all, or just keep spreading?

Again...having to point out such gems are out of my league this may seem like a dummy inquiry... DO you have 2 different open sights? If there's one set, and POA vs POI is good, but your scope allows a foot of variation something just ain't right there. I would expect a gem like this to provide a useful follow up shot. In some cases Barrel "b" saving a life from ornery game.

EDIT:
Done me sum readin'...
Recoil, harmonics, and a few other fundamental properties of physics come into "regulation" for such a gem. The more I know, the more I envy the folks with this kind of issue! These really do tend to be gems. I look forward to reading about the success that's coming.
 
Last edited:
Just out of curiosity who is jj?


"The only person who ever does work on my rifle is JJ Parodeau at CHAMPLIN FIREARMS Enid Oklahoma. JJ does outstanding work. He doesn't have a line of BS, just solutions!
JJ is a Master Gunmaker! I have seen him replace the barrels (resleeve) on a double. He does stock work.
He reregulated 400 NitroExpress's Hollis to a 60 cord rifle. JJ is trusted by several members of this forum." (NitroExpress.com)
 
Back
Top Bottom