2 1/4" bore carronade

[clum sum]

I know that this horse has probably been beat to death, but I am lazy and would rather ask a question than look it up. With that being said. What is the touch hole size, the ball size, and charge size blank and ball? And yes I am new to this, just ordered from Hern today.

[Double D]

Part of this you will have to determine when you get your gun.

To determine the correct ball size measure the bore diameter and divided by 40 and multiply by 39 and the is the ball size youy need for rule of thumb windage.  You title says 2 1/2 inch bore, but measure it first and make sure.  But using 2.25 here's the ball size nededis detemined.   2.25/40 = 0.05625 x 39 = 2.194. 

If you look at the top of the forum you will find some stickys  with lot's of useful information.  One you definitely want to look at is Safe loads and cannon plans,  You will find the guidelines for determine safe loads for your cannon.   

[artillerybuff]

Hern Iron Works barrels are shipped without a vent (touch hole).  If you plan to use friction primers you'll want to use a no. 7 drill.

Charge-wise I would say start with 3 or 4 ounces of cannon grade, and in no case would I use more than 5 in that particular barrel.

Anthony Variz

[gary michie]

Hi:
Up here in Hern country the rule of thumb for blanks is 2 oz. per in. of d.of the bore.

[Will Bison]

Last Summer a friend and I put together two Hern tubes, a Napoleon and a Spanish Howitzer, both with 2.25 bores. Two ounces sends the ball downrange with great authority. For blanks we like four ounces.

I have a source for used mill balls and selected the 2.125 size. These tip the scale at about 20 ounces or so and are reusable IF we can find them. We cut sabots from wood and glue the balls on for ease of loading.

If I remember we did the vents at about 3/16, just large enough to admit cannon fuse.

Bill

[Double D]

2 1/4 looks to be a very common bore size for Hern cannons.

I don't want to cloud the issue, so in the other post I am sticking with golf ball size.  We have a lot of folks with golf ball cannons and that's why I opened that thread

I don't have to be the one who does all of this.  One of you open a Poll and see if there is an interest in this size ball.  

I also suggest that one of you might want to contact Ken at Fox Industries and see what he can do for you. If you can show an interest in the sales of 700 to 1000 ball he will talk with.

Ken Macer
Operations Manager
Fox Industries, Inc.
22 Commerce Road
Fairfield, NJ 07004 USA
Tel: 973-227-4440
Fax: 973-227-5377
Visit: www.foxindustries.com

You don't have to go to Fox.  But Fox is the first company I talked with over the past few years who was willing to work with us..  If you can get them else where in a better deal, go for it.

[Rickk]

I have both a Hern Carronade and a Hern Mortar, both in 2.25 inch bore.

I wound up making the fuse holes .200 inches diameter, allowing use of both 1/8 inch cannon fuse and also 3/16" paper straw based quills.

For blanks I use 3.6 ounces, both because it is safe (four ounces is safe as others have already said) and also because my little digital scale over-ranges at slightly over 3.6 ounces.

[Evil Dog]

My half-scale Napoleon started life at a 2 1/4" bore Hern.  It has since been sleeved down to a 1 3/4" bore... less expensive to feed and a lot less stress on the carriage.