Not to be a "Debbie Downer", but I had issues with published recipes with Titegroup to work properly with my 38 Special wadcutter target level charges. I had several stuck bullets.
Once I adjusted the powder charges they worked fine. But, I've sworn off Titegroup.
Just one data point. Lots of folks seem to have success with Titegroup.
I also had this problem with tightgroup awhile back I was using spp but when I went to magnum primers i didn't have any squibs. But as things are now I am down to a 1,000 magnum primers so I will save them for the .357/H110 loads.