What a book says will be accurate will not likely be the same for your rifle, especially a Mauser. How I find an accurate load is to start at the minumum load and load 5 rounds at that level, then load 5 more rounds at .5 gr increments until I have the maximum load. Shoot each load at a different target, if you do your part you will see a pattern develop- the groups might get bigger or smaller with changes in powder charge.

Now I mentioned Mausers in particular in the first paragraph and 5 shot groups. The reason why is that 3 shot groups won't tell you much, but 5 shot groups will tell you much more. The mausers I reload for can produce tight 3 shot groups and throw 2 flyers in another tight group for some loads, which you will miss if you use only 3 shot groups. Other loads can scatter the shots or group all 5 shots tightly. You need to find the sweet spot so that all 5 shots are grouped together.

Alcohol, Tobacco, and Firearms... who's bringing the chips?