Please educate me - Cole question

I recently bought a Bill Cole gun and it has an interchangeable rib. The rib is stamped 350. What ribs were made to shoot higher? Thanks

 

These variable impact ribs along with an Adjustable Comb Stock combine to produce the following points of impact.

60/40
70/30
80/20
100% above the sight plane
120% above the sight plane
150% above the sight plane

The above information is from the Cole Arms website in the area for ordering parts.
The website also has a picture of each rib.

 

Thank you so much!

 

Are you sure your rib is stamped 350?
Bill Cole ribs are STAMPED
30034 ---- 300 rib for 34" barrel
40034----- 400 rib for 34" barrel
50034------500 rib for 34" barrel
ETC
NOTE: I have a 40034 rib i can sell $100 shipped.

 

I will look again, 99% sure. Thanks

 

Bill Cole #40034 rib, has a 70/30 POI with the original stock.