9.3x57 in a Husqvarna

[Dresden]

I have a Husqvarna in 9.3x57, I started making cases from 8x57 mauser brass. I set the die so when the cartridge was inserted the bolt closed with light resistance so I knew the shoulder was acceptable.
I saw several loads published and worked up to 45 grains of IMR 4895 with no problems.
I did not chrono yet as Minnesota's weather has been bad lately.
 My issue is the loads do not regulate, the gun is designed to use 286 bullets at a certain velocity to regulate.
The latest issue of Handloader magazine has an article by Mr. Gil Sengal who recommends a max load of IMR 4895 of 44 Gns, and he hasn't had a regulation issue. I have the same Model 46, made in 1929  and mine shoots low several inches at 25 yards. The sights are not adjustable, and I get the same result with 44 gn loads.


any help would be appreciated


Dresden

[RevJim]

 It sounds to me like your load is going faster than the original regulating load. Try slowing it down a bit and see if it changes. You may also try some 286 rn made by Hawk Precision. They are pure copper/lead very similar to the originals. Harder jacket material will raise pressures=more speed. Good luck to you Pard.

[Mikey]

My 11th Edition of the Small Arms of the World shows 43 gns of 3031 under that 286 gn slug, and that duplicates the Norma factory loading they tested in this edition.  If this does not bring your poi to poa at 25m then you may need another front sight blade. 
 
I have a M46 Husky in 8mm and found the sights to be regulated the same as the 8mm Mauser military rifles, hitting high at 100m.  I didn't mess with them as I scoped the rifle but if you plan on using open sights and stillfind you can not get poi at poa then youmay need a new front sight blade for your specific loadings and you can obtain a set of Swedish Mauser target front sight blades at either SAMCO or SARCO that give you different height blades, and all you need do is swap the front sight blades until you get the one that allow the slugs to hit where you want them.  These sight blades are for the target model of the 6.5mm Swedish Mauser, but all Mausers have the same size front sight blade dovetail.  These are 'square' sight blades, not the inverted V found on the rest of the military Mausers, and if you need to trim/file one down to get your poi up, it is a easy job.
 
I have found that most standard pressure cartridges usually hit to about the same point of impact at 50 and 100m, and for shots beyond that range I would want the slug to impact about 1-2" high at 100.  I would think that if your slugs hit low at 25 they will hit lower yet out further.  Good luck, hth.

[Dresden]

Thanks guys,


I use Hawk Precision in my 9x57 Obendorf Mauser, they shoot great.


I was wondering if anybody else had regulating problems, the latest issue of handloader has an article about
9.3x57 Mauser with load data, he didn't seem to fail to regulate with a matched factory velocity.
 
The front sight is not easily replaceable, I will just mill a slot to replace the rear sight blade, I can calculate the
difference I need.


Dresden

[Dresden]

Thanks guys,
The front blade is not dovetailed, I will have to work on the rear sight.

[mauser98us]

I mounted a Lyman 48 on mine. It's real easy to look over the rear sight when shooting. Make sure you use the correct sight picture,as the rear sight is much further from the eye than most folks are used to.

[Frank46]

The origional velocity of the 9.3x57 is in the area of about 2050 feet per second. So if your load is anything faster it won't shoot to the sights. My husky in the same caliber has an oversized bore and was made in 1928 98 FN mauser action. I slugged it and came up with .369 bore and .356 land. And yes them lands are higher than what we are used to. About .006 high or thereabouts. For a bunch of info regarding the 9.3x57 try gunboards swedish sporting rifles forum. Last I looked there had to be at least 4 or so pages of info. Regarding the front sight insert. mine won't come out either. It is supposed to come out from where the bead is to the front of the sight. I have the same front sight on my husky rolling block and a little kroil and out she came. But the other one refuses to budge. Frank

[kombi1976]

Shout me down if this is a silly idea but if your rifle shoots 2" high at 100yds with the current front sight why not leave it? It's the same as setting your scope 2" high @100yds and as long as you remember it's that high then it will make it better for longer ranges.

[anweis]

You can replace the sights with adjustable sights. It is a fairly simple and inexpensive fix.

[gcrank1]

You may not want to -0- it for that 25yd.s unless that is the distance you are going to do most of your shooting at.
For me, the open/iron sights are now a relatively closer range thing (compared to when I could really see), so I tend to go with a 100 yd. -0- even if it does not 'maximize' the caliber (for that I use a scope).
IMHO, if you are 2" low at 25 the bullet will likely still be rising and likely be fairly close at 100; try it and see.
And I agree that lowering the powder charge (within reason) may result in getting you toward that 'regulation', but there is more to it than just velocity, the burn rate of the powder choice will make a difference on the recoil impulse, as does how hard you 'cinch down' on your forestock hold and if you are shooting on/off the bench. If you are only shooting off the bench try shooting from field positions you are likely to use in the field, it can make a huge difference.