I can not speak about any of them with the exception of the 36 Varmint Grenade. I happen to have a few of them. They are almost the exact same length as 55 grain hollow points that I have on hand (Speer TNT). It is just a touch shorter than a 55 grain Sierra I have too. I would think that if a gun can stabilize the 55 grain bullets, it would certainly stabilize the 36 Barnes bullets, because you can push them faster and they are not any longer. The demo at Barnes site of the 36 Varmint Grenade is a 22-250 shooting through a grape. I have personally shoot them out of my 1-14" twist 223 and they stabilize just fine. If they will stabilize out of a 223 with 1-14" twist they should do just fine in a 22-250 too. I have also shot them out of my 2 Hornets one a 1-12" Handi and the other a 1-14" twist Savage. I had stabilization problems with both of them. I suspect I would have trouble getting 55 grain bullets to stabilize also, but have not tried the 55 grain bullets in these guns. At least for the 36 grain bullet, if you can shoot 55 grain bullets, then you should be able to shoot the 36 grain Barnes too. I would think you could use the same rule of thumb for the other bullets too. If they are the same length as another bullet and you can shoot them stabilized, then the Barnes bullets should too. I am just speculating here with the heavier Barnes bullets, the proof is actually shooting them.