Honestly, I would limit myself to 20-25 yard shots. Probably not what you want to hear, but it keeps you from making unethical shots and prevents the frustration of trying a thousand other options that don't work all that well.

If you do want to shoot out to 30-40 yards, don't mess around with field points. Shoot your broadheads at those distances and move your pins appropriately.

Like Lawman said, buy some more muzzy heads like what you will be shooting in the field and site in your bow using the broadhead Have some set aside for hunting and some aside for target. That way you are practicing with what you are shooting. Buying a sharpener would allow you to be able to even use the broad heads again. I have 6 muzzy 100 grains 3 blades and use 2 for practice and the other 4 for hunting. I also use the 75 grains 3 blades. 3 for hunting and 3 for practice. that way I know what im shooting with having to worry about the difference.. good luck

Most fixed blade broadheads are not very accurate because they tend to plane regardless of brand. The larger and wider the blades the worse the planing becomes. Likewise the longer the shot the more it becomes evident. That is why you have to keep shots short (20-25 yd) when using them. Mechanicals tend to shoot better but many do not do the job as well as a fixed blade. Most folks know I love the Rage 2 blade mechanical. They have never failed me. Last month on an angling shot my arrow went completely thru a large doe cutting a huge path. She only ran 40 yd. Click my name and check the photo. Some mechanicals do not work well oon angle shots. That was not a problem for me using the Rage.

I had the same issue with the Muzzy's, and what I found worked great for me was to fine tune my pins with the field points at different ranges; then when I used the broadhead, all I had to do was drop the entire pin housing rather than each pin individually again to account for the increased drop of the broadhead. The difference in pin-to-pin drop at increased distance was the same with FPs/BHs, just overall more drop with the change to BH. However, I assumed the practice broadhead was a good representative...now I'll have to reconsider given the above posts.

I wish it were as easy as using 125 gr field points. The additional weight might change the dynamics of your arrow. Try experimenting, though. I also agree - during season, I'd set the pins to broadhead impact points.

I would try using the hunting blades, those practice blades have to be alot more as thick as they are.
You could pick up replacement blades or get the sharpener.
If they were planeing they wouldn't plane the same way every time.