Reloading .303 British : 150 grain Hornady powder choice

My best, "To-Date" ten shot group with the French Resistance No4Mk1 Maltby is 2.0 MOA through the original MkII rear sight.

Both rifles were shooting a factory grade 174grn projectile and loaded to factory grade specifications so, it is of semi serious concern as to what you, m106 are actually looking for, accuracy-wise in your Lee-Enfield because if you want something better than a 2" group at 100 yards, you are going to need to purchase a more accurate rifle. As stated earlier in this thread. The Lee-Enfield rifles are Battle Implements and shoot accordingly. As long as the rifle can deliver the projectile to its intended target/recipient, it did as it was designed to do with a 3 to 4 MOA being acceptable.