Got my Lee 7.7 reloading dies,need loading info.

[jeep]

I have one box of Hornady factory loads. Alot of ww748 . I intend to load Hornady .312 150 gr. flat base spire point. Does anybody have data? I hear 30-06 can be trimmed and reformed. Thanks in advance

Information

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[jmoore]

If I may be a bit blunt- You ordered dies, and you know what bullet mfg. you intend to use, but you didn't get their loading manual whilst ordering/buying the dies?

Hornady has carried loading data for the 7.7 and 6.5 Japanese for years. I even bought one of their new manuals just to get the 6.5 Carcano data.

[jeep]

I have a Speer N-13 with no data for 7.7 and went on Winchesters site and no data for WW748. I will have to search Hornadys for info. I was hoping one of you guru,s would have been there and done that. Thanks starting Japanese collector and shooter. I have used the ww748 in 8mm,303, and 308 with great results and thought it would be perfect for the 7.7 Jap. It was made for the U.S. goverment for the 308 and was made not to cut and burn the rifleing with gas cutting in machineguns.

[Milsurp Collector]

No need to reform brass. Get the Prvi brass Graf Sons - PRVI BRASS 7.7x58 JAP UNPRIMED 100/BAG

For powders consider IMR 4064 or H4895, both are commonly available. For 150 gr bullet, the Hornady manual lists for H 4895 a starting weight of 36.6 gr and a max of 43.2 gr. For IMR 4064 starting weight 38.4 gr and max of 44.1 gr. Cartridge overall length was 3.000".

[303Nut]

Hodgdon Powder Co. has data using their powders with the 150gr. and 180gr. bullets. I've used IMR 4064, H4831, and Varget with good results. Check http://stevespages.com/312 also.

[jeep]

Found some data on gunsandammo website,keyed in arisaka and came up with data for ww748 and 150gr. bullet 40 gr. start and max 45gr. Good article.

[riceone]

Doubtful anyone will shoot a 7.7 enough to burn riflings with any powder. riceone

[jeep]

Ok tryed to size once fired Hornady 7.7 . Was lubed like the 30-06 or 8mm I load,but the 7.7 got stuck and pulled the rim off. The dies seem way to tight I knew when I sized it that it was trouble. I,m gonna send the die back to Lee with the case tuck in it and one once fired Hornady 7.7 case. Something wrong here. Lee will correct it Darn Riceone how I will I burn the barrel up in the T99 LMG. I will order a few 100 Priva cases. Can the chambers in the Japanese guns be that oversize? By the way the Hornady loading shot very good.

[riceone]

Thought you were talking about a 99 bolt action. You can usually tell when a case is too tight to resize in one stroke. I have found that it you push it in and pull back and re-lube the shoulder area the next shove will re-size the case and it will pull back out. riceone

[jeep]

I will try that . When I get the die back from Lee. I was able to load some new privi cases ,but I did not resize them just primed and set the bullet. They feed smooth will test fire them in a Beater ^th series 99 rifle. The 99 LMG does not belong to me ,but a friend who amnesty it in 1968 after finding it in a old house in the wall of the house he was rehabing back in the day. Thanks for the info on the half and half resize tip.