HELP!?

This last calf I had was out of an I 80 heifer and bpf comfort zone calf might have been 75 lbs no bigger cow wasn't fat at all ... Last time carpe Diem cow had and I 80 calf that was 75lbs needed pulled time before that out of a herd bull the heifer ended up having a 130 lb calf and that's the most maternal cow we have .. Time before that my drifter heifer(Ali son) was bred to a pb Angus bull calf weighed 70 lbs calf needed pulled but we got here right as it came out so still saved it. Time before that was my first heifer dirty girl and her first calf was 110 out of carpe Diem (probably my fault on that one) but at the same time her walks alone calf was only 80 lbs lol..... Point is what if a full proof breed that a calf could come out sideways with no problems don't care what they weigh or how fast they grow just want something alive and that I'm more than likely not gonna have to pull

If you really are not concerned about calf value I have a couple of guys around me that have calved out over 100 heifers with not one assist. They used longhorn bulls.

If your heifer can't have a 70lb calf she probably should have been a market heifer.

That is true. Has she had a calf unassisted? Did she push at all? If she won't do her part cowboy_nyk is right. I would sell.

If you dont want to pull a calf i would suggest not breeding clubbies because you are breeding for bone, hip, and muscle which does not equate out to an easy calving calf. I had a friend last year complaining about his vet bill and raises clubbies. All i had to say to him was that if your going to raise clubbies, your going to have a vet bill because of what you are breeding for.

Im not saying you dont have to pull calves on other breeds, but your chances are much less likely to pull a calf if you are not raising clubbies.

Limousin, long and slinky when they are born and they will get up and suck, they grow into their hip and muscle.

How long are you letting these cows try to have that calf?  They should sneeze out a 70lb calf, if I was to guess you are jumping the gun with pulling some of them. 

Lowline or Mini Hereford, I had a half sim half lowline out of my show heifer in February. Calf was 60lbs and very vigorous. Plus the majority of the heifers cycle back much earlier. From now on I will breed all my heifers to mini breeds!

Round hole, square peg theory..... 90 pound snake will come out much easier than a 80 pound square brick. 
I expect my heifers to have a 90 pound calf.  I hope they don't, but expect that if they had to, they could.  I also do not like to keep small birth weight heifers due to the fact that a lot of the time, they have smaller pelvic areas. 
Calving ease on top of calving ease on top of calving ease = calving problems.

Had a bull buyer tell me a few days ago that 80 pounds was too big of birth weight on a bull.  He said he was breeding mature cows.  I told him thanks for stopping but if 80 pounds is too big for mature cows, he needed more help than my bulls could offer.

I guess it is all in the perception.  (He has NEVER weighed a calf, according to him. He was probably having 80+ pounds calves but didn't know it!)