Some study suggest that from every HCG shot, the release pattern is about 72 hours, so that's why some doctors prescribe HRT patients 500 iu HCG e3d or 2x week to keep endo test production going as well as sperm production. (on top of the regular sust/TC/te injection) You will probably get about 50mg of test released from your natty. Every bit of test helps aye?
One study showed slight desensitization of leydig cells after 23 weeks of HCG @ 1500 EOD. What does it mean?
You can do year long cycles like some pros , with regular HCG injections. Just change the drugs every 8 weeks or so to keep growing. Natty still works, while on cycle, and make babies all you want.
2-3 week cycles are great for newbies to have a taste of steroid, without stocking up on load of drugs, AI, SERMS etc. Excellent for light users that want the extra kick every now and then.
But if you want to gain some serious mass, look jacked. You have to do longer cycles.
From my experience, I stop growing after 8 weeks of any test cycle (unless I increase the dosage after 8 weeks or swith drugs. Some people swear by longer cycles. So it's up to you. I suggest you use HCG from day one, 500iu 2x week, it doesn't make too much difference compared to 200 eod, but alot easier to plan your injections.
Now if you want 15-20 pound of LBM, you can probably make it. While extra glycogen storage + water, is LBM. But it is only transient hypertrophy, not contractile protein. 15-20 pounds of real muscle takes a long time to accumulate. So be realistic with your goals. I beleive the extra muscle you gain is relatively easy to keep, but the extra glycogen/water will be gone no matter what you do.
I would do the following cycle.
Week 1-7 Test Prop 350 mg/week , 100 EOD, with front load
Week 8-14 Test Prop 525 mg/week, 150 EOD
Week 1-15 HCG 500iu 2x week
Week 1-15 Adex 0.5mg-1 ED
Week 16-19 Adex 0.5 EOD
Week 16-19 Clomid 25-50 mg ED
350 mg of prop is equivilant to 400mg test-c, and 525mg to 640mg. With a frontload, I'll start gaining by week 2. After 7 weeks of that, things will slow down, but vola! I increase the dosage by 50%. So I keep on growing. By week 13 things start to slow down again, I give it another week to "solidify".
So that's a nice 12 weeks of actual growth. Compared to an odinary 12 week test-c cycle, which is really 14.5 week of supression. Test -C kick in by week 4, and I stop to responds at week 10 at the latest. Result? only 6 weeks of growth. So I hope you can see the logic in it. So start a little lower, and you can have the option to extend it/ bump up dosage later on. The ligher/smaller you are, the more you can gain. mm, think post is getting too long, so i will just stop here