Reloading data differences

redneckandy

Getting ready to load some 7.62x54R with some 110 grn bullets using H4895 powder. My Sierra book lists the starting load at 45.8 and the max at 51.8, while the Lee data lists the starting load at 51 and the max at 55. That seems to be quite a difference. Does Sierra just list lighter loads or am I missing somthing?

reloader44mag

I don't load bottle neck rounds but there could be a few variables. Brand of case, primer, etc. If it helps ya out any, My Hodgdons manual for a 7.62X54R for a 110gr hornady soft point, using Norma case and Federal 210M primer with H4895 is: starting 51.0gr, max 55.0gr and the manual indicates the 55.0gr charge will be a compressed load after bullet is seated. my 2 cents.

Rocky Raab

Lee doesn't do ANY load testing. They merely reproduce data found elsewhere.

But even if you compare data from two different testing labs, the loads will be different. Why?

They use different primers, different brass, different bullets, different lots of powder, in different guns, with different test equipment, using different test procedures, on different days, with different weather conditions, by different people who may interpret the findings in different ways.

The fact that they get even remotely close is a frippin' miracle.

mbsams

Every loading manual I have explains why data varies. Your sierra manual is a very good one - read it!

Rocky Raab

Thank you, mbsams. Your answer is the best I've read on it - and it will save me a lot of typing in the future.