Nobel reloading data anomaly
Posted: Fri Nov 26, 2021 4:16 pm
Some time ago, I was given a part used tin of Nobel Rifle Powder Number 3. I thought it was about time I did something with this and as I have got 50 .303 cases primed and ready, I thought I would load a few rounds using the Nobel powder starting load. So, I got out my Nobel manual and looked up .303 loads. I had a few odd bullets of 170 grain, 174 grain and 180 grain to use up. I noticed that the difference between the starting loads and maximum loads was from 2 to 4 grains. However, under the 174 grain bullet data for rifle powder number 1, the difference is 12 grains. That didn't seem right to me, so I got out my Thomas Bland catalogue and my Coggswell and Harrison catalogue as I knew they included data for Nobel powders. Sure enough, under the 173 grain bullet for rifle powder number 1, they give the starting load as 38 grains, not 28 grains. So, it would appear that my Nobel manual has an error. I don't know what the consequences are, if any, for under loading by 10 grains. The data for rifle powder number 3 is the same in all three sources, so I should be OK with the starting load for what I am using. I wonder if there are any other errors in the Nobel manual?
Peter.
RegardsPeter.