Winchester 760 Powder in 6.5 Creedmoor

[Schofield N0.3 45LC]

I recently loaded 3 6.5 Creedmoors with 130 TMK bullets, according to Hornady reloading Manual 10th edition it says can be loaded up to 46.0 grains of W760, so the 3 I loaded I dropped back to 44.0 grains. As I shot them in a Remington AAC-SD 700 with big barrel the cases swelled and had to take a piece of board and a mallet to open bolt and drive bolt back to get cases out. After trial and error I settled on 39.0 grains and at 50 yards I put 3 in same hole. Other reloading manual I have is a Modern Reloading 2nd edition, it shows with 130 grain
grain bullet using W760 max is 39.3. Lot of difference between the 2 manuals. On H4350 the Hornady manual says max 42.8 the Modern Reloading 2nd edition on H4350 max at 39.2 A difference of over 3 grains. I have learned my lesson on starting low and gradually going up in amount of powder

 

[lazarus]

Also check several sources and usually go with the low source as the starting place.

 

[DaemonAssassin]

Even Hodgdon (mfg of Winchester powders) says that your data is a bit high. Check for yourself.

https://www.hodgdonreloading.com/reloading-data-center

Bullet Weight

130 GR. NOS AB

Case

Hornady

Primer

Federal 210M, Large Rifle Match

	Starting Load		Maximum Loads
	Manufacturer	Powder		Bullet Diam.	C.O.L		Grs.	Vel. (ft/s)	Pressure		Grs.	Vel. (ft/s)	Pressure
	Winchester	760	Buy now	0.264"	2.750"		35.4	2,490	50,500 PSI		39.3	2,693	60,000 PSI