reloading data

[hvychev77]

I just purchased the richard lee book on Lee brand reloading equipment and data. I am reloading 300 win mag, 180 grain partitions, and using IMR 7828 powder. My concern is, in the back of the book where all the data is located, for my particular application, the book states the same amount of grains for minimum and maximum load. Could this be a misprint? I don't have the book in front of me so i am not sure what the exact amount is. Also, on Hodgon's website it gave different info. Hodgon had a minimum and maximum charge amount. Can someone clear this up a bit for me? Thanks....

 

[Col]

Hi.your correct..Richard Lee does have duplicated start and max data.My Lyman 49th shows a starting load of 69 grns,through to 76.0 which is a compressed load,hope this helps

 

[Jim Watson]

the book states the same amount of grains for minimum and maximum load.

I have seen the same thing in Lee for calibers I load for or were just curious about.

I understand that his maximum load is from the powder company, Lee does not have a ballistics test lab of his own.
My THEORY is that the starting load is from the Lee Disk measure listed for that or the next lighter load. Since the tolerance on disk cavities is always minus, that will give you a safety margin to start with even though the printed start load is the same as the maximum.

 

[Smaug]

The Lee load data is sometimes pretty useless that way. Some load books state the max. load, and say to start 10% below that. (I have a Hodgdon pamphlet like that)

My recommendation is to get the Lyman book, which has the most useful range of loads for a given caliber, IMO. Some of them seem to only have data for jacketed bullets, which irks me a bit.

 

[oneounceload]

You are better off using the powder maker's data every time - they do the pressure testing since they make the formula for the powder

 

[NeuseRvrRat]

i'd use the nosler book for nosler bullets

 

[rcmodel]

Could this be a misprint?

NO, it is a copy of the IMR data published at the time the Lee book was published.

At that time, IMR only published the one MAX load.
The reloader was expected to know enough to reduce that 10% for the Starting load.

Lee has no ballistics lab, and does no data testing.
Everything in the book is just copied from powder & bullet manufactures published data.

Your best source of data for Nosler Partitions is Nosler.
Or the IMR powder vender, which is Hodgdon.

Partitions don't play well with jacketed bullet data due to the solid mid section or partition causing more pressure then a jacketed bullet would produce with the same powder charge.

rc

 

[gamestalker]

RCmodel, I was taken back by what you said about Partitions not playing well with jacketed bullet data, I've never heard that before. Can you possibly elaborate with some supportive research, maybe a manfufacturer's statement to that effect. I use those from time to time, and sure don't want to suddenly encounter higher pressures.

 

[rcmodel]

It is a well known fact that solid copper bullets like the Barnes, and partition bullets like the Nosler are harder then lead core jacketed bullets.

I cannot offer supporting data, but I'm pretty sure the manufactures will tell you the same thing. I have seen it said over and over again in manuals and handloader publications forever.

rc

 

[hvychev77]

well, i opened up my other books when i got home from work. The Lee book states that the max load is at 74.5 grains, as well as the minimum load. They're both the same as i mentioned before. My speer book states that the minimum load is 74.0 and maximum being 78 grains, which would be a compressed load. would i be safe starting at 74.0 grains? I'm still gonna do some more research to find out more about this.....Thanks for all the input guys....

 

[General Lee]

http://data.hodgdon.com/main_menu.asp

 

[calofbend]

with that bullet and powder combo, noslers 6th edition states 73 to77 grns. and all are compressed loads. i use 73 grns. and thay are very accurate. win. lg. primers &win. brass3.340 oal.