perfect pattern powder usage

[GH-16]

Originally Posted by Pete Lester

I have gone through about a pound of it recently. It's a very fine grain powder and I thought there would be some leakage on a MEC single stage. With the MEC brass washer under the rubber grommet and the powder bottle screwed on very tight I haven't experienced much leakage at all. For 7/8 12ga loads the Claybuster grey wad gives good crimps in the Winchester AAHS hull. In the older AA Compression Formed hulls I have to use the Claybuster 3/4 ounce wad for a proper crimp. I am using a #16 MEC bushing and it's throwing 14.7 grains of PP.

Thanks for the information on the bushing you're using. I recently bought an 8 pounder of perfect pattern and plan on switching over to it, but then I ran into an issue where I couldn't find a bushing chart for it.

I really appreciate you posting the bushing size and now I have a starting point.

Does anyone have a bushing chart for perfect pattern?

[J.B. Books]

Originally Posted by Paul Ehlers

Thanks for the information on the bushing you're using. I recently bought an 8 pounder of perfect pattern and plan on switching over to it, but then I ran into an issue where I couldn't find a bushing chart for it.

I really appreciate you posting the bushing size and now I have a starting point.

Does anyone have a bushing chart for perfect pattern?

Perfect Pattern has been listed on the official MEC Bushing Chart for awhile, you can find it here:

https://www.mecoutdoors.com/Images/d...hing-chart.pdf

As always trust your scale rather than the bushing chart. Two bushings of the same size can throw different amounts of powder.

Since my post I found that PP is a dirty powder, it doesn't leave flakes of unburnt powder, it's more like a coating of soot. Hoppes cleans it right up but the first pass will look like coal tar.

[Mike of the Mountain]

Never trust the bushing chart to throw exactly what it says. ALWAYS test your bushings. I like to throw 3-5 charges and dump them back in the hopper. Then I'll throw 3 or 5 charges and weigh the entire charge, then divide it by 3 or 5 and look at the average. Then I'll weigh the next 5 individual charges. That way you'll get a very good idea of what the bushing is throwing. While doing all the testing for the 8g loads, I did not find a single bushing that threw exactly what the chart had listed. They're usually under the listed charge (lawyers are a PITA).