it takes time. someone should expect it to take 8 months to 2 years to master. yep, i've punched myself a couple times. don't do it anymore, and my release isn't set as light as it used to be either. it takes quite a while for a person to isolate the rhomboid. that is pure back tension. there are other methods that are called back tension, and are to some extent, that take much less time. it would be much better for a person to get some instruction, and realize that if they want to do it they need to be prepared to be in it for the long haul. shooting will go to pot for quite a while. in fact its better to just blank bale for a month or so if you can stand it, even shooting with your eyes closed so you just feel it.
this is exactly the reason not many people undertake it, and most of the ones who do give up - because they don't get results fast enough - and for some strange reason - they think they should - but they didn't hear that from me. at this point i'm pretty sure you could outshoot me with your caliper, but i've come a long way. maybe next year i can talk a little smack about my shooting.