I'd say go 140gr.
Previous recommendations of 140's are good, but be aware that some 7x57's have long throats that prefer long bullets. In those rifles the Federal 175's often shoot well, and the Winchester 175 do too if you can find some. I have also taken a few deer with the S&B ammo, they make both weights. Norma makes a nice in-between & all-round bullet, their 156gr. Oryx bonded. Really there are no bad choices in the 7x57.
How would I determine if that was the case with my rifle? Is it something I would notice over time while shooting it?
I had an old mauser that didnt shoot very well, no matter what I tried (just plain worn out) But I do remember the difference on the shoulder from the 140 to the 175 was noticeable. This was years ago, and it was my first centerfire rifle. Maybe that kick would be nothing now, but at the time I noticed when I got a box of heavier bullets...
If it's a Santa Barbara, it has a commercial barrel. Santa Barbara also made their own version of the 98 action and had some serious issues with them. They eventually went out of business because of this.
I've had a couple of their offerings. One in 7x57 and one in 308 Win. Both were nice rifles and pleasant to shoot.
I never had an issue with either of them and both of mine were some of their early offerings and were made for them by??????
The 7x57, loved off the shelf 140 grain factory Western Cartridge Co (now defunct) ammunition. It also liked the old Dominion offerings in 140 grain. I tried some Dominion 175 grain bullets in it and there really wasn't any difference other than point of impact. They all shot well.
The 308 Win, was similar. Shot most factory ammow well.
Mind you, back in the early seventies, if you had a rifle that consistently shot 2-3 inch groups at 100 yards, it was considered to be a good shooter.









I would recommend 173 Prvi Partizan SP. They work well! However, it depends on what weight you barrel likes. My military and sporter Mausers prefer the 173 grainers.
It's more of a rifle loony thing. For hunting deer with iron sights you probably won't know the difference between different hunting loads between 140-175 grains. For the ulitmate in accuracy you may find that heavier bullets group better - but you can also kill a lot of deer with a iron sighted rifle that keeps its shots within 3" at 100 yards. I shoot four 7x57's and tend to use 175's for everything in them. There is a small advantage for "deer only" using a lighter bullet that opens quicker, it may result in a slightly shorter death dash when an animal is hit in the vitals. The heavier bullets are slightly better choices for bigger stuff like moose, but again the difference is just "splitting hairs."
One think that I can tell you is that the felt recoil is significantly more on a 173 gr load compared to a 140 gr load.
I tried a 3X9 on my 7X57 years ago, but for my hunting needs I settled on a 6X Leupold and for me its more than adequate.
If you're shooting factory ammo, you should be aware that most of the American stuff is severely downloaded out of defference to older rifles. The 140's normally run at around 2600 fps, whereas a good handload can easily reach 2800. If for some reason I was condemned to using factory stuff, I would stick to 175 grs., or try to get some European manufacture.
Manufacturer Model Qty. Inv. Caliber Velocity (FPS) Wgt. (Gr) Description Price ($) PPR
Sellier & Bellot No. 2932 20 0 7x57 2378 173 SPCE 24.99 1.25
Sellier & Bellot No. 2955 20 0 7x57 2621 140 FMJ 19.99 1.00
I had one of those Santa Barbra mausers in 7x57. The throat on it was not as long as many of the old military barrels. Mine shot the 139 gr Hornady's very well and I took a number of whitetails with it. With a max load of W 760 powder this combination came very close to 270 performance. That is not faint praise .Any of the 139,140,145,150 or 154 gr bullets would make this an excellent deer rifle. With a good 160 or 175 gr bullet you could use it on moose as well. Good luck with that rifle, it should keep you well fed.
Previous recommendations of 140's are good, but be aware that some 7x57's have long throats that prefer long bullets. In those rifles the Federal 175's often shoot well, and the Winchester 175 do too if you can find some. I have also taken a few deer with the S&B ammo, they make both weights. Norma makes a nice in-between & all-round bullet, their 156gr. Oryx bonded. Really there are no bad choices in the 7x57.




























