n007
I've tried Hodgdon Hybrid 100V in a 257 R. Used Remington brass and primers with Hornady 100 g. flat base bullets in 0.5 g. increments from 44 to 48 grains. COL=2.94. Fired a single round through the chronograph with the following results.
44 g = 2889 fps
44.5 g = 3016
45 g = 3044
45.5 g = 3093
46. g = 3115
47 g = 3174
47.5 g = 3205
48 g = 3220
Shot in a custom Mauser with a 22" barrel (don't know make). This rifle averages about 100 fps faster than my other 257 and the Mauser will have a stiff bolt with some factory loads or other commonly suggested reloads with H4350 and H414. I experienced no stiffness to bolt opening in the above sequence. Later I used the 47.5 g. load to take two doe antelope so I have shot the rifle a number of times with that load to sight in, etc.
I also ran a series with heavier bullets trying both Hornady 117 g. BTSP, 115 g. Nosler partition and 115 g. Nosler combined technology. These were loaded from 42 to 46 g. of powder. I used CCI BR2 primers, Rem brass. With these there was a slight stiffness to the bolt at the 46 g. load. Velocity was 3003 fps with both the Hornady and Nosler Partition, the CT Nosler was shot on a much colder day and it recorded 2923 fps (these were for 45.5 g of powder). I haven't shot the heavier bullets for accuracy yet.
My results basically mirror the information on Hodgdon's web site for Hybrid 100 V in this particular rifle. The 45.5 g load is as high as I will go with the 115 g Noslers (both kinds) as the Noslers seem to develop more pressure than the Hornady 117 g. which has a shorter bearing surface from what I can tell.
Sorry for the long epistle but you asked! Clint
Last edited by CKW; 05/26/10. Reason: clarify load data
"It is wise, though, to remember above all else: rifle, caliber, scope, and even bullets notwithstanding, the most important feature of successful big game hunting is to put that bullet in the correct place, the first time!" John Jobson
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