New to elk calling with diaphragm calls, is there a difference between rocky mountain and Phelps calls?
like others have said, get a few different ones and try. I couldn't keep a diaphragm in my mouth for a lot of years, and they would gag me as soon as I tried making a sound.... I bought a bunch over the years, bent them, trimmed them, etc... just couldn't use them.
the calls that changed the game for me were the wapiti river outdoors calls, I could blow about half of those calls ok, but that was hope, so I kept at it and I was happy I had found one I could use.
I kept buying other diaphragms, and overall it was getting better, but the wapiti river calls were still my favorite until I picked up a couple Phelps amp diaphragms, and they were better yet.... I have been using them for a few years now and now pretty much all of my elk calling is with diaphragms now, I love the diversity of sounds one can make with them.
I have since bought several rocky mountains, and they just don't fit me as well, I don't care for them. I have a friend that is the opposite. I don't use the wapiti river calls anymore, I should pick a few up again this summer. for now, I like mostly phelps, and a few Berry diaphragms for bugling.
if you aren't getting them to work for you, don't be afraid to call elk with external calls, they get kind of a bad rap, but I got by just fine with them for a long time.... they are great for locating bulls, and you can get bulls called in just fine with them too, I have learned it's a lot more about reading the situation than hitting perfect notes.... elk aren't super smart animals, especially when their brains are clouded with breeding and nothing more.... don't get discouraged either way, they all work fine.
diaphragms are certainly more enjoyable to use, and they feel more effective, but I don't think that's necessarily true looking back in time. use the tools you use best.