???Safe load with no manual???

[czvz]

How does one safely develop a load for a projectile without a load table?  For example I purchased some Privi/Partizan 6.5x55 Swede 139 grain soft points, but I have no load table for Privi/Partizan.  Is it just a matter in finding a similar style and weight in a 'Hornady reload book and start out on the minimum powder charge and work my way up and examining cases for splits ect.  Also, I want to duplicate Federals Reduced/Managed recoil for the .308 it uses a Speer 170 gr. Hot Core projectile.  After looking at the latest Speer manual, I found no load data for 170 gr. Hot Core under .308 Winchester.   

[BBF]

You can certainly do this using charges for similar shaped bullets. A round nose bullet of the same weight would have more bearing surface then a Spitzer Boat Tail and produce more pressure as a rule.
 I have even gone to powders not listed in some application keeping powder charges on the low side to start and comparing burning rates of powders listed.

Sometimes bullet manufacturers use slightly different diameters for the same calibers. 44  cal come to mind as well as the older Speer .264 

Some of the factory reduced recoil ammo uses lighter and more fragile bullets then the normal weight class to achieve this.
Hodgdon's 4895 is particularly well suited for reduced loads if that cartridge and bullet combination show a load in any manual. 60% of maximum would be the lowest starting point.
Real low velocity loads can be made with SR type powders as listed.

[fastbike]

Yes. For instance, if you look in the Hornady book for 7.5 Swiss, you will find the same load data listed for approximately 6 different 150gr bullets. These bullets vary widely in type.