By having an adjustable charge bar it's easy to put any charge you want in a shell. I just use the same powder charge for 7/8oz but bump the shot down a tad but not so much that I can't get a good crimp. The Claybuster guide that comes with their 4100 wads shows 16grs of 700X for a 7/8oz load giving 1200FPS at 6400PSI. A little less shot should up the FPS a bit. The IMR handbook shows 15grs/5300PSI at 1150FPS with a 24gm load. Is 24gm between 1oz and 7/8oz ? Everything I listed is with a Remington or Win shell. I noticed the same of everything but going to 1oz ups the PSI about 1500. Paul
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