If I had to choose between susp and prop, I would run prop. Susp is tricky stuff. It's water based with tiny test crystals suspended in it (looks like milk). For steady blood levels it should be injected 2xed, so you run through lots of injection sites. The injections are painless, but 24 hours later they hurt a lot. My theory for this is the crystals irritate the muscle tissue. For short-acting, I would go with prop because it's an oil and you should be able to get away with half as many injections which won't hurt later.
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