12g 2 3/4”
1 oz.
2 3/4 Dr. Eq. - 1235 feet per second (measured 3 feet from muzzle)
3 Dr. Eq. - 1290 fps
1 1/8 oz.
3 Dr. Eq. - 1200 fps
3 1/4 Dr. Eq. - 1255 fps
3 1/2 Dr. Eq. - 1300 fps
3 3/4 Dr. Eq. - 1365 fps
1 1/4 oz.
3 Dr. Eq. - 1165 fps
3 1/4 Dr. Eq. - 1220 fps
3 1/2 Dr. Eq. - 1275 fps
3 3/4 Dr. Eq. - 1330 fps

16 gauge 2 3/4”
7/8 oz. 2 1/4 Dr. Eq. - 1145 fps
1 oz. 2 1/4 Dr. Eq. - 1110 fps
1 oz. 2 1/2 Dr. Eq. - 1165 fps
1 oz. 2 3/4 Dr. Eq. - 1220 fps
1 1/8 oz. 2 3/4 Dr. Eq. - 1185 fps
1 1/8 oz. 3 Dr. Eq. - 1240 fps

20 gauge 2 3/4”
3/4 oz. 2 Dr. Eq. - 1145 fps
3/4 oz. 2 1/4 Dr. Eq. - 1200 fps
7/8 oz. 2 1/4 Dr. Eq. - 1155 fps
7/8 oz. 2 1/2 Dr. Eq. - 1210 fps
1 oz. 2 1/2 Dr. Eq. - 1165 fps
1 oz. 2 3/4 Dr. Eq. - 1220 fps

This is the Clever page and you may be able to e mail them with the question
http://www.clevervr.com/en/hunting-loads/t3-gauge-20

They have a right case without the concave base and all things considered that would help lower the psi

I sent them an e mail last week or so and it was received. IF they give me any info I'll pass it along. I have been trying to contact Tom Armbrust as well but haven't had any luck.