RevMike
What is the loading range (start/max) for 160-175 bullets with Hunter?
Good morning from breezy Florida.
I posted this a while back on the "Good 7x57 Loads" thread, but below is Ramshot data for both Big Game and Hunter. At this point I haven't done much of anything with 154-grain bullets - I'll get around to it - but the 160s at an estimated 2550-2600 fps, and the 175s at about 2350-2400 shoot very well in both my Montana ASR and M98. These velocities are estimates since I haven't run them through a chronograph yet - I'm waiting for a bit of cooler weather - but they ought to be close in 24 inch barrels. The 160s are Speer Deep Curl (n.b. I use the Deep Curl data on Speer's site just to be on the safe side), Grand Slams, and Partitions. The 175s are Deep Curl and Grand Slam. All shoot right around an inch at 100 yards off the bench. They might do better, but the reticles on the scopes are German 4s, and both are thick enough to cover a one inch target dot at 100 yards. So I'm not getting "target precision" even if I was good enough. But it's good enough for my hunting purposes. Once the 175s are gone, I don't expect to replace them, and will probably stick with the 160s and 154s at about 2600. Again, most of my shooting is at game, so those bullets at those velocities should do anything I need them too. Our deer aren't very big, and even though I've taken some really big porkers, most of the ones I shoot are table size - way less than 100 pounds - all generally within 75 yards, and all either CNS shots or not shot at all.
Anyway, that's all reaching around my butt to scratch my elbow. Here's the data I think you're looking for.
I ran across this last night. I looks as if Ramshot is providing some updated/modern reloading data.
-------------------------
Since we do not have any specific lab tested data on this caliber, we can provide you with some guideline, based on calculations and information from other sources.
Caliber: 7x57 Mauser.
Barrel length: 24”
Pressure spec: <56565 Psi/3900 Bar (CIP) original
Powder: Ramshot – BIG GAME®. (1st Choice)
Bullet weight: 100-110 grains.
Start load: 47.7 grains (2975 - 3075 Fps)
Maximum load: 53.0 grains (3275 – 3375 Fps).
Bullet weight: 120 grains.
Start load: 45.0 grains (2700 - 2800 Fps)
Maximum load: 50.0 grains (3000 – 3100 Fps).
Bullet weight: 130 grains.
Start load: 43.7 grains (2575 - 2675 Fps)
Maximum load: 48.5 grains (2875 – 2975 Fps).
Bullet weight: 139/140 grains.
Start load: 42.0 grains (ca 2550 Fps)
Maximum load: 47.0 grains (ca 2900 Fps).
Bullet weight: 150-154 grains.
Start load: 40.8 grains (ca 2450 Fps)
Maximum load: 46.0 grains (ca 2800 Fps).
Bullet weight: 160 grains.
Start load: 40.5 grains (2350 – 2450 Fps)
Maximum load: 45.0 grains (2600 – 2700 Fps).
Bullet weight: 175 grains.
Start load: 39.6 grains (2300 – 2400 Fps)
Maximum load: 44.0 grains (2500 – 2600 Fps).
Powder: Ramshot – HUNTER®.
Bullet weight: 120 grains.
Start load: 48.6 grains (ca 2780 Fps).
Maximum load: 54.0 grains (ca 3140 Fps). LD ca 106%
Bullet weight: 140 grains.
Start load: 46.8 grains (ca 2600 Fps)
Maximum load: 52.0 grains (ca 2950 Fps). LD ca 102%
Bullet weight: 150-154 grains.
Start load: 43.7 grains (ca 2450 Fps)
Maximum load: 49.5 grains (ca 2750 Fps).
Bullet weight: 160 grains.
Start load: 43.7 grains (ca 2375 Fps)
Maximum load: 48.50 grains (ca 2675 Fps).
Bullet weight: 175 grains
Start load: 42.0 grains (ca 2300 Fps)
Maximum load: 47.0 grains (ca 2650 Fps).LD ca 99%
