quote:

Originally posted by 400 Nitro Express:
With the possible exception of the .577 & .600s, all double rifles should be regulated at 100 yards, never at 50.
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"Serious rifles have two barrels, everything else just burns gunpowder."

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Originally posted by 400 Nitro Express:
Then why not regulate them at 25, or 10? Sometimes double rifles that regulate fine at 50 do not at 100 and regulating them at the longer range is the only way to get it right. You're the one that wants to make it "black and white" that a rifle regulated at 50 will be fine at 100, and that just isn't always so.
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"Serious rifles have two barrels, everything else just burns gunpowder."

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Originally posted by GeoffM24:
I ordered a Chapuis 9.3 also and I went with the standard 50 yards. The difference between 50 yards and 100 yards is .1 inch with the 9.3x74r aka nothing. I have a strong suspicion that the indoor range is only 50 meters and it is a pain in the you no what to go outside or to some range to do it at 100 and that is what you are paying for.
If they regulate at 50 they will be fine at 100.

quote:

Originally posted by GeoffM24:

quote:

Originally posted by 400 Nitro Express:
Then why not regulate them at 25, or 10? Sometimes double rifles that regulate fine at 50 do not at 100 and regulating them at the longer range is the only way to get it right. You're the one that wants to make it "black and white" that a rifle regulated at 50 will be fine at 100, and that just isn't always so.
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"Serious rifles have two barrels, everything else just burns gunpowder."

You most certainly could do it at 10 yards or 25 yards but it would be more difficut to judge the shot placement at such short distance. After a certain point the law of diminishing returns kicks in and advantage or a even longer distance becomes nill. By the time a bullet has gone 50 yards its path is set, it isn't going to make a right turn at 78 yards. Me, you and everybody else could not tell if a rifle was regulated at 50 or 100 yards so "the only way to get it right." just isn't true. If you can't tell, you can't tell me it's better.

Heck, some double makers use lasers to sight in their doubles which I don't think is good enough because a bullet is not a laser. 50 or 100 yards is just nit picking.

Chapuis tend to be very accurate rifles so if 50 was as aweful, as your absolute statements imply, they would shoot worse then average.

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some double makers use lasers to sight in their doubles

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Originally posted by Jim Manion:

quote:

some double makers use lasers to sight in their doubles

I know some makers use a laser to get close before putting ammunition through the rifle, but am not aware of any quality double rifle maker that stops with the laser. If there are makers like that out there, it would be good for the rest of us to know.

In regard to distance, I get the sense that we are mixing up two very different concepts - regulation versus sighting. I believe Mac's comments highlight the differences.

100 yards has pretty much been the standard for regulation and sighting for a long time. Cutting that distance in half doubles the potential for issues. When you measure case length, do you stop at the nearest inch or get down to hundreths or thousands of an inch?

Regulation at between 80 meters and 100 yards provides a much better view of what may be an issue. You might get a 2 inch spread at 50 yards and think everything is fine - until you find that spread is now 4 inches at 100 yards.

With a double, you are esentially trying to corrdinate the point of impact between two separate rifles trying to insure the shots never cross. And you are actually relying on recoil to make that happen. With the right and left barrels set up to "torque" in opposite directions. Ideally, your spread at 100 yards is the distance between the barrels of the rifle. That means both barrels are shooting in a straight line.

Also keep in mind that there are bullets out there used in double rifles that take time to stabilize. And I would venture to say, depending on the rate of twist, that 50 yards may not be an adequate distance to achieve stability. That is just one example arguing for a 100 yard standard.

Sure, you can take a lot of shortcuts to get close. But a 50 yard standard is indeed a shortcut. It saves time, space and as a result, money. It is a way to keep production costs low.

Now, if you are going into this with your eyes open and are willing to lay out $5000 or more for a rifle regulated at 50 yards, that is great. But understand that any guaranty from the manufacturer is going to be based on a 50 yard standard and not a 100 yard standard.

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The laser comment is straight out of Dangerous game rifles by Terry Wieland

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You don't weigh yourself to the grain and you don't measure yourself to the thousandth. After a certain point you just can't tell the difference.

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Originally posted by BigFiveJack:
Well said MacD37, and if I understand 400NitroExpress correctly,

a double of a caliber less than 577NE should have the bullet holes from

each barrel touching at 100 YARDS. And the bullet hole from the

right barrel should be on the right side of the target while the bullet

hole from the left barrel should be on the left side of the target.

The bullets should NOT have crossed at that 100 yard mark,

but within the next 100 yards they certainly should. Am I getting this right?

....Mac >>>===(x)===> MacD37, ...and DUGABOY1
DRSS Charter member
"If I die today, I've had a life well spent, for I've been to see the Elephant, and smelled the smoke of Africa!"~ME 1982

Hands of Old Elmer Keith