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12 ga wad question
Old 10-09-2025, 11:30 AM   #1
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Default 12 ga wad question

I am looking at loading data using Perfect Pattern for 12 Gauge loads. I like the low pressures that you can get with this powder but am a bid confused with one of the wad recommendations. For a 7/8 oz load it is calling for a CB 0175-12 wad. Just wondering why a 3/4 oz wad is used in a 7/8 oz load?
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Old 10-09-2025, 11:39 AM   #2
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Perhaps it's intended as a 3/4oz load in a 2 1/2" (?)
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Old 10-09-2025, 12:25 PM   #3
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Edgar this is from the Hodgdon Reloading Data Center. I entered 2 3/4 Win Aa hulls, 7/8 oz lead shot, perfect pattern powder. Received 48 loads and out of that this wad is recommended in 24 loads. It reads CB 0175-12 for the wad.
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Old 10-09-2025, 12:46 PM   #4
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Steve, the CB 1078-12 wad loaded with 7/8 ounce will sit a little low in Gun Club or STS hulls with lighter loads using Perfect Pattern powder because so little VOLUME is occupied by PP as compared with other familiar bur largely unavailable powders that require a much higher number powder bushing. PP is a modern high energy/low volume powder. I have many cases of 1078 wads on hand and use them ahead of PP powder though the crimp is a little low and dished. I've never used the 1075 wads (3/4 ounce) but I presume the column under the shot cup is a bit longer which will result in a flatter crimp when 1075's are loaded over PP powder and with 7/8 ounce of shot.

Times are changing with many of the old familiar bulky powders discontinued or only available at premium cost when the powder mills have extra capacity.
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Old 10-09-2025, 02:18 PM   #5
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Thanks Frank that makes perfect sense. I do the same for 7/8 oz 20 ga loads in top gun hulls. I use a 3/4 oz wad and my crimp is perfect, where a 7/8 oz wad is dished out like you said.
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Old 10-09-2025, 03:11 PM   #6
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What Frank said Steve. It has to do with the density of the powder. Actually wads have very little effect on the pressures in a load especially loads under 9k in 12ga. A good crimp is much more important in performance.
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Old 10-10-2025, 10:36 PM   #7
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Steve, I often use the 1075 wad in 7/8 oz loads, esp in Gun Clubs instead of the 1078 wad. Eliminates the dished crimp. One of your buddies, Bill Jannele or Scotty turned me on to this at Hausmanns couple years ago .
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Old 10-11-2025, 08:18 AM   #8
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The 3/4 CB wad has a small, about 1/4 w 1/8 h plateau inside the wad cup, unlike the CB 7/8 wad, to accommodate the lighter shot volume and raises the crimp a bit and works well with powders PP. I use them for 7/8 loads as well.
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