I found this old thread and thought, who in the world works up loads this way, and why was it not condemned!!
A lot of these older calibers are listed at less than max, staying well bellow todays safe pressure's. It is for good reason, that old Springfield or Mauser that so many were built on over the years are not safe with todays modern pressure levels!
It is your best responsible job to start with starting loads in any rifle! I also would never tell anyone to start low and work up in 2 grain increments!!!
The wise thing to do with any caliber is work up slow! in a 35 cal. or even 7mm, 1/2 grain can show a difference in a safe load and a hot load!
Try this 1/2 grain jump in a 17 caliber or even a 22 caliber can be dangerous! As the smaller the bore the quicker even the slightest change can show dangerous spikes in pressure!
I never try more than 1/2 grain in any caliber when working with any new load or component in any cartridge. But when I work with 6mm and below 3 tenths is as large a jump as I will make, in a 17 or 20 caliber 2 tenths would be good advice!
But make no mistake, this same statement goes for when you reach the book maximum! Just because the book says so, don't make it a fact in every rifle. Over the years decades ago, I found many old cartridges like 257 Roberts, 7mm Mauser, 30/06, and others, are many times anemic in modern loads! All three in modern firearms I have found to greatly increase in performance, and cartridges like the old Roberts to give performance close to the magnums in that caliber and do it with much less powder, longer barrel life, and better accuracy!
But responsible load work is required not only to find a safe maximum, but to find your best useable accuracy! loading 2 grains even 1 grain increments will not only be dangerous,, it will not give you any worthwhile information developing any load on any cartridge! Slow down and smell the powder,, it will be much safer, and much more educational!!