10 Gauge 2 5/8" Load Results

[Matt Buckley]

I sent in a couple of loads I worked up for a 2 5/8" 10 gauge Parker lifter and here are the results from Precision Reloading:

Bismuth Load:
10 Gauge Cheddite 2 5/8" Hull
Win 209 Primer
SP 10 Wad
16 Ga 1/8" card wad filler
1 1/4oz Bismuth #2
26 grains of WSF Powder
Overshot card and roll crimp

Avg Velocity: 1164
Avg Pressure: 8342

I worked this one up for a potential goose hunting load.

My second load was a lead load:

10 Gauge Cheddite 2 5/8" Hull
Win 209 Primer
Sp 10 Wad
4- 16 ga 1/8" cards
1 1/8oz #8 lead shot
22 grains of WSH Powder
Overshot card and roll crimp

Avg Velocity: 1166
Avg Pressure: 8807

The pressure is higher on this load than I would like.

[Victor Wasylyna]

Matt:

I tested a 1.25 oz bismuth load using 26 grains of WSF and had lower pressure, but a bit more velocity. (http://parkerguns.org/forums/showthr...er+super+field). Not much difference in recipe, but you are about 1000 psi higher than me. My hull was 2 7/8 inches, fiber wad under the shot, and a fold crimp.

Did you individually weight each sample? Or did you meter load the samples? Can you post the result form?

I am particularly interested, as my 26 grain WSF load is one of my go-to duck loads. I’ve been very pleased with it this season.

-Victor

[Mark Garrett]

The difference in pressure is because of the hull length and the use of soft filler wad.

[Matt Buckley]

Here is the information sheets from these two loads. I did individually weight out the powder and shot for these loads.

[Paul Harm]

I've never understood why a shorter shell produces more pressure. If it does simply because it's shorter and that's the only difference, please explain why.

[Matt Buckley]

I have duplicated this Bismuth load in a Remington hull with a cork filler under the shot and I'm going to send it in for testing. I would think with a roll crimp that this should have lower pressure like Victors 2 7/8" load. I will post the results when I get them. I'm looking for a goose hunting load for my lifter, that is why I'm going with #2 Bismuth.

[J.B. Books]

Originally Posted by Mark Garrett

The difference in pressure is because of the hull length and the use of soft filler wad.

Not likely. The tested loads are not identical, the 2 5/8" load used a Cheddite hull, the 2 7/8" load used a Remington hull. I will wager use of the same hull will show closer results in pressure.

[Victor Wasylyna]

Originally Posted by Matt Buckley

I have duplicated this Bismuth load in a Remington hull with a cork filler under the shot and I'm going to send it in for testing. I would think with a roll crimp that this should have lower pressure like Victors 2 7/8" load. I will post the results when I get them. I'm looking for a goose hunting load for my lifter, that is why I'm going with #2 Bismuth.

Matt:

I look forward to seeing the results. The roll crimp is now the only significant difference from my load. Pressure should drop. Perhaps even below the pressures I produced.

-Victor

[Mark Garrett]

Originally Posted by Pete Lester

Not likely. The tested loads are not identical, the 2 5/8" load used a Cheddite hull, the 2 7/8" load used a Remington hull. I will wager use of the same hull will show closer results in pressure.

I would say very likely , yes the change in hull will change pressures also . The testing I've done shorter hulls always produced more pressure . Tom Arburst told me less space for gas to expand = more pressure .

Also with the testing I had done using TSS , which always required the use of fillers , the more soft fillers ( felt , cushion wads ) = lower pressures and less consistency . As opposed to harder filler ( Nitro cards and cork ) = more pressure .

But don't take my word for it you can always call Tom Arburst , he can explain it better than me.

[Paul Harm]

Well, I'll have to call Tom. I don't see where there is less space for gas to expand. Yes the shell is shorter but that's because less space was used in the wad section not the powder section. I could see what type of wad or how deep the crimp was would effect pressure. After the holiday I'm gonna have to call him.