No idea about the SARMS, but I've recently started a 'Cut' and went with 8mg of Salbutamol from ADC. There has been a TON of recent research on it for sports performance lately, due to a Cyclist getting popped for it (WADA had to accept that some cyclists actually *do* have asthma and it's legal up to a certain amount, LOL) Fat loss, muscle retention/addition, performance. The doses were 8mg 3x/day (half life is like E-HCL ~4-5 hours) but even at Indian prices, that gets expensive for me, so I'm doing 1-2 times a day. Unlike some of it's siblings, it's approved for children and even pets - so safety profile is good.
Be advised - DO NOT start with 8mg!!!!! Start with 2mg and check heart rate and BP. It's not a Pan-Betareceptor agonist like Ephedrine (It's beta2 only) but go slow just in case.
Salbutamol is known as Albuterol in the U.S.