XL33 Powder in the old Higginson Square tin and cardboard

This all the info I have.
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Given to me some years by a WWII Blackwatch Veteran. He died a few years ago.
Was even in charges of the Quebec War Amps last few years of his life.

Cartons from Higginson Powders
 
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Have you tried contacting Higginson's? The last time I had a question about powder equivalence, a quick email was all it took.
 
Yes, today.
"Unfortunately, we have no listing or data for XL33 powder from the Ammomart documents.

Regards,

Higginson Powders"
 
The reason they don't have information on that powder is those containers aren't the original Higginson's packaging for that particular powder. Likely the fellow that gave it to you went in on a group buy or picked it up across the border. Not that long ago you could go into some gun shops and pick up powder by the brown paper bag. I would say the packaging was repurposed.

Because I don't know how knowledgeable your benefactor was I won't make any judgements. Personally, I wouldn't even bother with such a limited amount of powder and relegate it to my wife's flower bed where it will enhance the colors of next year's petals exponentially.

It's your powder and your circumstance though. If you trusted your friend's competence look at the charts for a faster powder than 4759 such as Lil Gun and use a starting load listed for that. A chronograph is your best friend in this case when working up loads with surplus commercial powders. The powder in those old cans is also difficult to identify because you don't know whose recipe was used to produce it and because it is so bulky it's difficult to find another powder that will fill the case to the same level.

I believe there were four or more designations for 4759. Which one do you have???

You also don't mention what you are going to use it in.

Anyway if you are bound and determined to use this powder use starting loads first of a faster powder and measure the velocity over a chronograph. If the velocities are lower than the starting velocities of your powder tables then increase your loads until you reach the desired velocities without other pressure signs. FAST powders get nasty FAST. You have such a small amount of powder there and depending on what you intend to use it in, you might run out of powder before you have worked up a good load for it.
 
All things I have considered, but I do like a mystery.
Ganderite mentioned no experience or knowledge of this powder, but a lot with 44 version.

Most likely will end up using Reloader 7, 4198 or 4227 for Swiss Vetterli reloads.
 
Decide to try it out as 4759. Worked fine in the same charge Min-Max range for the caliber as SR4759.
Haven't lost any further body parts. :)

Too bad there were too many people at the range to set up the chrono.

Once I finished testing it, I let a few people try out the Swiss Vetterli.
There were many a smile.

20.5 grains with a 325gr .44 bullet.
Thanks to Andy for the taller brass front sight. Elevation worked out fine at 50yds with rear sight set at 400m.
 
Decide to try it out as 4759. Worked fine in the same charge Min-Max range for the caliber as SR4759.
Haven't lost any further body parts. :)

Too bad there were too many people at the range to set up the chrono.

Once I finished testing it, I let a few people try out the Swiss Vetterli.
There were many a smile.

20.5 grains with a 325gr .44 bullet.
Thanks to Andy for the taller brass front sight. Elevation worked out fine at 50yds with rear sight set at 400m.

If that bullet is doing about 1400 fps like I think it is:

- it's a near Max Load;
- it will be about 4" low at 100 yds;
- 16" low at 200 yds;
- 30" low at 300 yds; and
- 48" low at 400 yds.

You can easily to file the front sight down to suit.
 
I came across few containers with doubtful labels-I found that the only good way of using them is shoot it in one gun with one load that works.

Any experiments with unknown powder are iffy so err on the side of caution.
 
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