I have used them with Barnes TMZ's and worked just fine. I use the spinjag with every projectile I load not just polymer tips.

If buyingonly one I'd get the "original" spinjag, as it can be used for loading and cleaning. I have both the loader and original, while the loader sits on my range rod full-time I honestly haven't seen a great benefit to it over the original in terms of accuracy or loading in general. I see a big benefit to the "original" for swabbing/cleaning and works great for loading so it sits on my ramrodsmaking allthe hunting trips.

I continue to support/promote Gunn's Spinjag's b/c IME they have been so great to deal with. A commodity that seems to be lacking in this day and age.