| mbogo375 |
| (.275 member) |
| 10/11/05 03:01 AM |
|
Re: Used Double Trouble
|
In reply to:
I feel bad for Emory and his luck in owning this rifle. It is however an interesting problem. Let's get past all of the who did what to the rifle and when and try and figure out what happened to it?
It has been suggested that perhaps monometal solids were shot through it.
Overloaded ammunition? Emory has stated that one case he pulled was 4 grains higher than the other so marked.
What expanded the Chambers and how many rounds would it take? 1, 2, many?
One poster who has some knowledge of Doubles claims he loaded some rounds for it an it shot into 2 ". Emory says 11" with one barrel shooting high. Assuming both are correct what could have happened to the rifle to change POI?
On another vein, what causes a Double to lose it's correct regulation?
Lovu Zdar
Mick
Mickey,
There may be another possibility that has not been explored yet. I don't know if anyone has measured actual bore diameter (only groove diameter as I did). I could be wrong on this, as JJ probably did and just did not tell Emory the bore measurements (only the groove measurements as have been posted), or if they were reported I just missed them.
Some, including Graeme Wright, have speculated that, in addition to monometal solids, over-stressed rifling can be due to a combination of smaller that standard bore diameter and modern steel jacketed solids, even though groove diameter is standard. Their contention as most of you already know, is that modern steel jacket inserts are thicker and less tapered than in the old steel jacketed solids (consequently harder to engrave on firing). This, in combination with smaller than standard bore diameter could lead to over-stressing the rifling.
This is a sobering thought for all who shoot vintage doubles with solid bullets, as most of us do with a DG rifle.
I would appreciate any thoughts from forum members on this line of reasoning.
Jim
