Ive done 2100mg before for 10 weeks I really wouldnt suggest going lower than this if you want decent gains as this will only leave you with 315mgs of Test each week.
You can still grow on a low dose like this just fine many will disagree but the body only produces around 70mg give or take a week so yes it will be a bump and will allow you to get decent gains.
I stacked with 1test and got about 15 pounds would of gotten more but I caught food poisoning mid cycle from a bad can of tuna and lost around 10 pounds so I was playing catch up.