doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Loesche drilling

Hal,
Just for info in your research,mine is a 12ga,Meffert,underlever, hammer gun.It has a good forearm, good locks with both hammers, good trigger plate(set trigger doesn't hold, most have been misadjusted).Barrels have been brazed together at muzzle(can be used for "hakenstuck"to line for extra barrels or replacement barrels on other drilling.Missing lever and other parts for barrel selector. The stock is homemade and may not even be good for firewood.
This is one of the plain Mefferts, so should be easy enough to match engraving on another gun.
Mike

Note that the 12 in a circle is the nominal gauge for which the gun is chambered. 13/1 is its actual bore size, in this case meaning it will accept a 13/1 (.710") plug gage to a depth of about 9" (22CM if I remember correctly) but will not accept a 12 gage (.729") plug. Your actual amount of choke is not marked.
118.35 is a gauge size based on the same formula as the shot barrels. This indicates a size of .340". From only limited experience with these "Gauge" size markings on rifle barrels it seems these were made in increments of .010", thus the 118.35 mark would show it would take a .340" plug but not a .350" (108.49 gauge). For a 9.3x72R (.364") bullet size the bore is most likely very close to the .350".

In my experience with those marked 118.35, the groove diameter usually around .358-.359".This makes finding bullets pretty easy.
Mike

Thanks Miller. I got confused when Skeet said 16/1 was full choke. Will change description accordingly. So it looks like the barrels are both cylinder bore.

Woodsman kindly informed me that the gun was made by E. Schmidt & Habermann in Suhl.

Looks like the paraffin method is accurate Der as I measured .358 which equals 8.6mm groove diameter.

Sorry Hal

Did not mean to mis-lead, just posted the info about the 16 gauge gun in this article

http://castboolits.gunloads.com/showthread.php?75108-9-3x72R/page2

Mike

On the proof marks Crown/G denotes a Rifle barrel; Crown/S denotes a Shot barrel & Crown/W denotes a Choked barrel. If choked the Crown/W will e in addition to the Crown/S & simply denotes a choke with actual amount not specified. Can be anything from .2 mm (.008") on.
When the poster on that other forum stated the 16/1 meant that barrel was full choked he was simply in Error. 16/1 denotes a size of .669" which is .007" larger than a nominal diameter of
.662" for a 16 ga so quite obviously not a choke size for a full choked 16ga.
Hal if the gun in question has a Crown/W on either barrel then that barrel was not Cylinder bored, but choked to some extent which only measurement can determine. If it is cylinder in one barrel & choked in the other then only the choked barrel should have the Crown/W mark.

2-piper,
Actually,a crown G doesn't actually mean it has a rifled barrel, it means it was proofed for a single projectile.This would usually be a rifled barrel, but the same mark would be used for those smooth bored guns intended to use bullets.If the gun has rifle sights and a smooth bore, it may not have been converted from a rifle as some may suppose.
Mike

Thanks. I read the other thread in Boolits. Is the bascule the same as the knuckle or the surface where the forearm touches the action?

So is the nominal size for 13 ga .710 and the 13/1 gage made .007 larger or do the increments vary by guage? I assume these gages are made to measure from the chamber so there would be no interference from any choking.

I also read about the French and German set triggers. This gun has the German type I guess as I can't move the front trigger forward a bit to set the back one. The adjusting screw is on the back of the front trigger. But I don't get much, if any, reduction in trigger pull when I pull the back trigger after the front.

Hal,
The set trigger on the drilling is a single set trigger. You push the front one forward to set the front one, not the back one.The trigger should not be set until right before you intend to fire the rifle barrel.If,for some reason, you don't fire the rifle after setting the trigger; open the action and touch the trigger to unset it(the safety can be on or off).My German gunsmith friend was of the opinion that it is more dangerous to carry a gun with the safety on, but the trigger set, than with the safety off and the trigger unset.Don't forget that the front trigger fires the righthand shot barrel also, and if left set can create a "surprise" if firing the shot barrel.
Mike

Mike;
You are of course correct the Crown/G denotes a solid projectile. The G in this case I believe is for Geschoss which loosely interprets to Bullet & not Gewehr for rifle. As the G is most often found on rifle barrels I tend to forget its exact meaning, thanks for the correction.
Hal;
The in-between gauges are set halfway between gauges, given to three decimal places with succeeding digits dropped, not rounded. The gauge sizes them selves are derived from a formula based on the weight of lead & are rounded to three decimal places. thus a 13 gauge is .710", a 12 gauge .729". .729" + .710" / 2 = 1.439/2 =.7195. A bore marked 13/1 thus will accept a plug gage of .719" diameter to the specified distance but not a .729" one. Its exact size could be anywhere between those limits.
In sizes 10ga to 4ga there were two in-between sizes which were marked as for instance 8/1 & 8/2. In this case each size was 1/3 of the space between the two gauges. The actual number then will vary according to the difference in size between two gauges.