Man up. They work fine if you give it a bit of gusto. lol
I pull down 7.62x54r to reload 303brit, and while they are certainly in there pretty good, they are not impossible. I found the key is to use a very hard surface to hit. I use a brick. I found that things like a 2x4 or plywood were too soft and cushioned the impact too much, but with my brick (its 6"x6"x1.5" or so) one or two good whacks is often all it takes. I"ll be honest, It feels like I am going to break the thing every time I use it, but its held up to over 100 rds so far.
I have also heard you can push the bullet into the case a bit to make it easier to pull with a kinetic puller. (Because you break the sealant used around the bullet. Its not a crimp issue, they are basically glued in place with a sealant to keep the powder safe from the environment, thats what the red stuff around the bullet is.)