Shorthorn Blood Percentages Registration?

Is the Shorthorn blood percentage chart being used anymore or is it out the window?  The reason I ask is if you go by the chart a 15/16 bull bred to a 7/8 cow results in a 15/16 calf non-appendix registered (*x......).

I realize if you say 14/32 + 15/32 you get 29/32 which is not the same as 15/16. or to put it another way 90.6% SS instead of 93.75 % SS. 

The new system is showing that animal as (*AR........) instead of (*x........)
Is this a glitch in the system? or Is this a good thing?

https://shorthorn.org/wp-content/uploads/2015/05/Blood-Chart-Revised-1_1_20141.pdf

I have not investigated this much but, would assume the registry has a macro built in that only designates non-AR only after it reaches 15/16 and not 29/32.  Also is the animal in question black or blue because any black color will carry an AR regardless of percentage. I think this is a good thing only allowing them in the book once they have achieved the 15/16 amount.

I haven't looked at or noticed the registrations much lately.  But I can speak a little on the topic from past experience.

There was a short time when a modified blood chart was used.  It didn't give purebred status to 15/16 and if I remember right most cattle with the * also did not receive 100% blood credit.  At was a short lived chart with some of the confusion and problems it created. 

Mathematically it was completely accurate.  If you ran the actual percentages and matched them up on the chart they where they were supposed to.  It helped to prevent breed dilution by crossing the 7/8 on a 15/16 and resulting in a 15/16th offspring that could be bred to another 7/8 and so on and so forth with every generation registered as 15/16.  During that time the percentage of shorthorn blood is very slowly eroding away.

Practically speaking there were a few issues that arose.  First was absorption of other past historical breeds .  Lincoln Reds are now recorded in the herd book.  Red Maine's were given a 3/4 registration even though historically they were on 5/8 shorthorn.  After 2 crosses that offspring could be registered as 15/16.

On the flip side although 15/16 bulls were registered and marketed as purebred they were not given credit as purebred in the system.  We had a group of foundation commercial cows at home and went through to back record the calves.  Different cow families were done on different years.  It worked out where the blood chart change really pinched us.  After stemming from commercial cows after 4 crosses of breeding daughters to the same purebred bulls (1 was a 15/16).  The resulting heifers were a group of purebreds with the crimson registration papers and 1 AR with green papers.  The only difference was the year it was registered.  under that scenario it took 5 crosses to make purebred and starting with the red Maine only took 2.

Our shorthorns started with a bull purchased iaround 89 or 90. We kept many hiefers but registered none of them.  In 99 we bought some heifers and a bull in addition to beginning AI. This was the beginning of registered and appendix breeding up.  Most  all my cattle have an extra generation of shorthorn breeding. There is one cow whose dam was a granddaughter of original bull so she has less than an extra generation of Shorthorn.

On paper the sire is 15/16 but in reality he is 519/528


To answer the question of color the animals are not black.

The new system had miscalculated a % female for me once. ASA corrected it and now I just watch % when registration paper posts on line.