I've had an off/on interest in this for a few years and have usually passed because I've tried other adapters in my shotgun before only to find that the POI was way below the POA. The groups were fine once I could figure out where to hold to measure them on paper. That turned me off of adapters in a shotgun for a while, but long story short I started thinking about the .45-70 adapter again because... I don't have a .45-70 rifle and even the H&R/NEF ones are starting to get pricey and they don't have iron sights. At $165, the MCA adapter is the least expensive way for me to get into .45-70. So, I checked to see if anyone had done a review of the .45-70 adapter and I found one video of a guy who was shooting his in a combination gun that had front and rear sights and at 15 yards his looked like it was shooting to POA. I have surmised that this happened because the weight of the bullet helped raise the POI and thought, given that .45-70 can shoot anything from 300 to 500 grain projectiles, that I should be able to find a bullet that does the same for me in my shotgun. Thus, I come here now to get input from others to see if this is something worth pursuing. I'm not looking to get 1 MOA with this, I probably would never shoot beyond 150 yards with it anyway. Trajectory is so steep.