For a dose as related to and already tested on humans see:
Publications and Presentations
(View the topics "relevant presentations" under ACE-031 / Muscle)
Unfortunately, you will not likely be able to get the exact replication, but you can come close. Of course, there are many unknowns. "Myostatin" was discovered in 1997. In other words, the understanding is less than 20 years with very few human trials.
For labs that will supply myostatin silencers, keyword "lab" along with
"gdf-8 peptides"
"myostatin antibodies"
"GDF8 inhibitors"
"propeptides gdf-8"
"monaclonal gdf8"
"synthetic peptides"
You will find that there are many labs. You should request that your order comes prepared and ready to use for your "animal" experiments. If it cannot come prepared, request the correct reagent from the lab that you purchase it from. Do not store it and you should use the desired dose asap upon receipt. Also, if the lab says that you will need to centrafuge your order, you will need to do a dyi at home (lots of shaking).
If you get too small of a dose, it is unlikely that you will receive any benefit. In nature there are humans without any myostatin so, hypothetically there would be no such thing as immediate death or over-muscleing from silencing too much myostatin.
Hypothetically, and observed in many experiements, myostatin only works on skeletal muscle, but you would be really, really, fucked if your body was the strange-needle-in-the-haystack which unexpectedly hypertrophys smooth and/or cardiac muscle. For some the risk might be worth it. You could help me and perhaps many others if you correctly record and report the deatils of your proccess and findings. Of course, this could be done in private too.
Cheers!