Alloy 24:1
casting temp 800 F
Brand new Lyman .446 mold  scrubbed with hot soapy water, flushed with brake cleaner.   did the scrub and flush twice.  really brushed it hard with wire brush 2nd time.  Cabine tree handles.  Every  bullet from 1st to maybe 30 ( when I quit) came out of left side as near perfect as any bullet  could, the right looks like the photo.

I tried heating the right side with a torch, only got wrinkled frosted bullets.  Have tried different closing tension on handles.   
I got three good bullets out  and they were not the last three, just random.  Decided to quit wasting my Saturday and do something else.   Any ideas whats going on?

I have a mold that does exactly the same thing and I've done it all the things you've done. The only way I can get good bullet has l
smoking the cavities with a butane lighter

Almost looks like air being trapped. Are the vent lines cut deep enough and are clear?

Old age.....

  Get it up to casting temp, take it outside and give it healthy squirt of Zippo lighter fluid.

1. disassemble the mold. 
2. SOAK the mold in "paint thinner/mineral spirits" for a few hours at least.
3. Remove the mold components-blocks, sprue plate and as you do that blot off most of the mineral spirits
4 Before the residual mineral spirits have a chance to dry, Rinse the blocks and sprue plate with acetone. Let dry.
5. Cast with ladle, alloy temp at 720F or higher. Tip mold sideways and apply the alloy filled dipper to the sprue plate. Tip the "assembly of mold and dipper Gradually to fill the cavity- keeping the dipper spout 
snug on the sprue plate "cone" and "bump" the whole setup
on edge of pot a couple times during a 'few seconds'  before separating dipper. 
beltfed/arnie

Heck I was born with wrinkles, got rid of them as I grew up now they are back again. 
Seriously, most wrinkles are caused by sprue plate hole being too small, I've opened up a few molds sprue plates and have one dipper I opened up the hole in the pouring spout on. Degreasing the mold is another trick as sometimes when casting the cutting fluids do not burn away. Some scrub the mold out with a tooth brush with Dawn dish washing detergent and hot water. No bore brushes. Acetone is also good for mold cleanout. And as previously stated some brake cleaners leave a film on what ever they are sprayed on. Auto parts stores sells a product caller CR-12 or something pretty close to that. I've used it to clean a new mold or one I haven't used in awhile. I have a little hot plate used in labs. You can dial just about any temp to pre heat your mold. Frank

I for got to add the warnning about brake cleaner . Brake cleaner around heat is a very bad no no , the fumes given off when heated will attack the nervous system , For a good scare for the day read the MSDS sheet on brake cleaner