I would stick with 300-400 mgs just like everyone else said. I know organon amps come 2 ml at 100 mg/ml which is good for that, but since your prob talking about ttoyko since you said 300 mg then I would go with the shot every 5 days, or split up your shots into about .75 ml twice a week(and if you only bought enough pins for the number of shots in the bottle at 1 ml shots, thats ok...you can use them twice, as long as you sanitize of course). Personally I would have bought a different test ester than prop because that is more for short hard cycles and deca is for longer ones, but I ran deca at 600 mg/week 4 weeks then 400 mg/week for 2.5 weeks(not intentionally, but I couldnt get another bottle so I had to use amps) and I had some good gains from that stacked with dbols(35 mg a day). Since I am rampling...300 is low but since its your first cycle thats not bad, if you have enough to last you the whole cycle then start doing shots every 5 days(and hopefully you only bought enough prop for the first couple weeks before the deca kicked in..otherwise I would have spent that money on other things).