It is obvious that you can draw what you see and that your eye is developing. Keep at it, what you are essentially doing is learning a visual language and just like learning any language it takes practice and persistence.
Good luck with your ultimate carving.
dave
Dave, this is a really good observation. Drawing is a great tool for those interested in carving and engraving. A comfort level with drawing helps the artist express his/her ideas without actually ruining material.
He gets to look at it from different angles, and can show others, as is happening here.
Drawing over and tweaking the drawing may be frustrating when one just wants to get the rifle done, BUT! the practice gives the artist a real familiarity with the job for when it comes time to carve. During drawing, your hand and eye become practiced at developing the curves and shapes. This practiced eye helps when you get to the carving.
Good luck! and keep us posted!
Tom