I guess I should explain my point of view/opinion on the “cheap training ammo.” First off, group size is so far down on my list of priorities for training, it’s almost out of sight. If the 100 yard prone 20 shot group is 4 inches, ok, now I know the capabilities of the system. (FYI pretty sure S2H has proven that most of us are in the 3-4 MOA group when put under time and pressure anyways) With a 4 MOA system I am still within a 17 inch Killzone out to 400 ish. Then I just practice field positions at random distances, or shoot the S2H drill, but always under time pressure. I focus on the things that matter like setting up the best and fastest shooting position I can for the conditions, wobble zone, breathing, trigger control, spotting my impact, reloading, adjustment and or follow-up shot. If all those things are improving and I am still within my 4 MOA group size and I executed the system and hopefully a little better than the last time, I know I am improving. When I’m faster, I’m steadier, and I’m withing the capabilities of my system I know I will be accurate. Then when I put the golden BB handloads or whatever in I am good to go. For me I have to train the things that make me accurate before I worry about my group size. If I have a sub MOA 100 round group from prone with no time pressure, but cant hit the water standing in a boat from any other position or under time and stress, then that sub MOA group is pointless. Point number two is, I’m currently on track to hit the 8K round mark this year and hommie needs to hit that number without donating a kidney to buy ammo…
Again this is my thinking and approach, I am sure there is a healthy dose of “blasting” coming in the comments haha