Need help on daughters science fair project.

[BWE Firearms]

My daughter has decided on a high school science fair project and she asked me for help and I in turn am asking for your help. She came up with the topic "How does bullet diameter effect penetration". Velocity has to stay the same (1050 FPS). I think we should try to keep bullet shape and weight as close to the same as possible. I think we will be shooting into Sem-Test ballistic gel. We will be using our 50 and 338 THUMPERs and a 300 Whisper\Fireball\Blackout. I can get 300 grain round nose bullets for the 338 and 50. Three rounds of each caliber needs to be tested. This also means I will have recast-able ballistic gel for future use if anyone wants any tests done.

Questions:

What distance should I set the gel at?

Whats the heaviest round nose bullet available in .308?

Any other caliber suggestions?

Any other suggestions or comments?

I want my daughter to win this science fair and with your help we can.

P.S. Almost forgot everything will be shot suppressed of course. The school should love that!