Graybeard Outdoors banner
1 - 20 of 46 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter · #1 ·
Ok so silly question but I sooner be safe then sorry.

is there a conversion (a safe one) if using Goex ffg BP and my max load is 200 grains (for a salute charge)
At the present time I am using a Lee Dipper 4.3 CC (62.3 grains according to Lee)
is there a direct conversion of grains to weight that I can use to be more accurate?
I am using 3 scoops (with lee dipper) and having no issues with firing (other then wanting to fire it more) ;D

I was thinking of using a digital scale to measure it out but no idea what the right answer is to go from volume to weight.
Or should I forget weight and stick to the volume and the Lee dippers?
 

·
Premium Member
Joined
·
1,375 Posts
If you have access to a scale measure the actual weight that the Lee dipper holds in BP. I used a Lee dipper for loading shotshells and after getting a scale found that the weight it held was more than what it was said to be. Make sure that you measure several times and take an average.
 

·
Super Moderator
Joined
·
17,005 Posts
What is the bore diameter of your cannon.

Each different grade and brand of powder will have it's own different weight per volume. Not a lot different, but different. Humidity will also change the weight but you probably won't notice that unless you m ake really big charges.

The Lee Dippers I believe are calibrated in c.c. and in my experience are inconsistant and vary to much for reliable loading. Their best use is as a powder scoop to but put an approximate amout of powder on the scale and nothing more.

You need to weigh each charge to get it right.

Unless you are shooting a cannon under .75 inch you really should be using Fg and not FFg especialy with a load as large as you report.
FFG is a faster burning than Fg and will give a substantial presure increase for no additional increase in velocity. The pressure increase from Cannon grade to FG is 40% for example.
 

·
Premium Member
Joined
·
10,039 Posts
The DigiWeigh digital scale I have measures in: carats, grains, grams, and ounces. I got it on eBay for under $20, shipping included.

Are you shooting a mortar?
 

·
Registered
Joined
·
20 Posts
Discussion Starter · #5 ·
nope it is not a mortar.
It is a 0.75 barrel and I am using ffg trying to keep it under 200 grains of powder it is goex powder I use but as above stated the lee dippers should be used as scoops.
The reason for the 200 grains is for a salute charge and Dom did an excellent job of making wall thickness nice and thick just for said reason.
But I still would like to know what is the formula or conversion from weight of goex ffg powder to grains or vis versa.
Any ideas?
 

·
Moderator
Joined
·
7,223 Posts
There is no hard and fast formula for that conversion. The best you can do is measure a large amount of powder via a volumetric way and then measure that volume with a scale and do the math.
 

·
Registered
Joined
·
3,418 Posts
Do you really get that much more bang with 200 grains over 100 grains? Or are you pushing a lot of unburned and burning powder out the tube?
 

·
Registered
Joined
·
20 Posts
Discussion Starter · #11 ·
ok stupid question but what is a card wad?
I have been using news paper and kind of like the smoke and fire ;)

But if I can get away with a "Card wad" and 100 grains of powder, even better.

Any links to this card wad or what do I use or make this out of?
 

·
Premium Member
Joined
·
808 Posts
I'll caution you about newspaper - it smolders. That means, as it come out you'll have tiny bits of smoldering paper that will burn anything it lands on. When I first started getting into blackpowder, I was shooting cannon near a tent, and ran out of my normal blank wadding and substituted newspaper at the suggestion of a more experienced shooter. The tent now has a sunroof, and I've never taken advise from that shooter again. Using napkins or rice paper would be much better if paper is to be used.
 

·
Premium Member
Joined
·
808 Posts
pyrocroats said:
ok stupid question but what is a card wad?
I have been using news paper and kind of like the smoke and fire ;)

But if I can get away with a "Card wad" and 100 grains of powder, even better.

Any links to this card wad or what do I use or make this out of?
http://www.trackofthewolf.com/(S(yqc12555rg51gej2yo0srq55))/categories/tableList.aspx?catID=2&subID=37&styleID=118
 

·
Registered
Joined
·
3,418 Posts
That .75 bore is darned close to 12 ga. You might try some over shot cards. Although, if you are making foil cartridges, I don't think you will need any wad at all.

OK< I just checked that chart - 11 ga.
 

·
Registered
Joined
·
20 Posts
Discussion Starter · #15 ·
ok so normal shotgun wads for a 11 gauge will work?
or use a 10 gauge over sized?
and... what thickness? 0.025 ?
and yes I agree the paper does come out nice and hot LOL
BTW how do you like the sun roof?
(sorry bad humor)

does the tinfoil not also coat the barrel on ingnition?
and make it dirty and have to be scraped more often?
Sorry never tried tin foil powder loads ...yet ;D
 

·
Premium Member
Joined
·
808 Posts
Not my tent... ;D

The worst thing that happens with foil is that the back part of it may get stuck in the breech, and you'll have to worm it out. Also, keep in mind, anything in front of the powder becomes a projectile when it's fired, including the foil. This may not be a big deal depending on where you're shooting, and I'm not going to criticise anyone for using it, because there are some definite positives to it, and many shooters have been using it for longer than I've been alive, but something to be aware of.
 

·
Registered
Joined
·
20 Posts
Discussion Starter · #17 ·
hmmm good point on the foil, I have tried tissue paper instead of news paper and found not much of a difference in firing a salute charge.
Which brings me to another question:

How much paper/tissue should I be using and how packed should it be against the powder?
I would think the patch would be just about the same?
 

·
Registered
Joined
·
7,583 Posts
Minimal paper is a good rule of thumb.

You have the capability with a lot of paper to blow it up. (Experience talking here.)

The purpose of the card or paper is just to provide a LITTLE resistance to build up pressure to get a good sound.

Salute charges are typically twice a FULL charge behind a ball. Lots of packing will do too much.
 

·
Premium Member
Joined
·
3,043 Posts
How about sand wrapped in the foil ? it acually 'looks' like a ball going in . then it will be blasted and the sand will not travel very far . foil either .

Gary
 
1 - 20 of 46 Posts
Top