- October 28, 2018 at 1:32 pm #68910
i go this past summer i got a husqvarna m46 in 9.3×57.
the left is formed into a 9.3×57, the right is fire formed
i have done a bore cast and it comes to .3665″. i still have to do a chamber cast. it does have some free bore, ahhh strike that, it has a whole lot of free bore!!!!! i would put a bullet(colored up by sharpie) only 1/16″ into the case. then i would close the bolt action. i would open her up and i would find the case and bullet the exact same way. i tried to do it 4 or 5 times but to no avail. so i put the case and bullet into the magazine and i found that 3.115″ is the way to go. i can’t remember, but 3.130″ ? is the magazine length. the 9.3×57 fire formed are 2.220″, an actual 9.3×57 is 2.240″. not enuff of difference, 0.020″. the nice thing is i don’t have to trim the cases!!!!lol
the 5 shot group is nice, but a 3 shot group is better. my God that barrel heats up!!!! its a hunting rifle, not a target rifle. the sights on the m46 are so so. it only goes right or left, no up and down. its more of a rifle changes to its load, not a load changes to its rifle. thats why i (my gunsmith) d&t for a scope. i know it has three holes in the receiver, but that was done in europe in european scope mounts. i’ll pass on that. weaver and burris? has the scope mounts necessary, so i’ll use them.
next year i’ll have her and with 270-280ish fn gc cast boolit done and she’ll go out for deer/ black bear.
- October 29, 2018 at 12:19 am #68916
Hi Todd, Wayne and I both have 9.3x57s, an M46 and M46A. I have load data and measurements for it here.
You’ll probably want to slug the barrel and maybe do a chamber cast. I found that the throats on both are just over .5″ long and the bores are oversized. We ended up sizing down .375″ bullets in a push through sizer from NOE.
My loads are abit hotter than most listed. I figured that if the M96 action was chambered in 6.5×55, then I should be able to load the 9.3 to the same pressures.
The chambers on both of them have head space issues and are abit too long. With light loads you might end up with primers being pushed out. I sized the brass up to .416″, then back down to 9.3 with the sizing die backed out some to create a second shoulder. Once the brass was fireformed, I just neck sized from there and didn’t have any more problems.
The .375″ 200gn Sierra, sized down to .369″, shot really well.
The Speer 9.3 270 shot really well at a lower velocity.
Let me know if you want any more details.
- October 29, 2018 at 12:30 am #68917
Hope you don’t mind, I cleaned up your picture links.
- October 29, 2018 at 1:16 pm #68919
i did slug the bore, twice. it comes out at .3665″. i was thinking that a .368″ cast boolit “should” chamber, but i have to do a chamber cast. i’ve shot it(40-45.0grs imr4895 and 285gr prvi) and the primers were good. i am lucky that i didn’t size them to .416″ and then back down to .366″. the hornady die is a Godsend!!!! just put in the 8×57 and it comes out 9.3×57(well sortof). i’ll take any reloading info on the 9.3×57, esp with cast boolits.
i’m going to h4895, but i have a pound of imr4895 thats doing nothing. i’ll probably go with a 280gr fn gc at about 1800-1900fps. it will be for deer and black bear. i “plan” on doing a 50 yards and less shot, but i’ll take a 150 yards and less shot.
- October 29, 2018 at 2:00 pm #68920
Somebody, don’t remember who, sent me some of the NOE 9.3 280LFN to try out.
This was 24gns of 2400 for 1540fps, sized to .368″, seated to 2.965 to just engage the rifleing, and lubed with 2500+
For jacketed, H4895 seemed to do the best for me. I tried some slower powders that quickload suggested would give more velocity, but they were just too slow to give complete combustion(at least I think so…)
I settled on the .375″ Speer 235 sized down to .369″. Loaded with 54gns of H4895 for 2510fps and a 1.4″ group
I shot a doe with this load and it gave complete penetration from chest to butt and exited.
Here’s a pic of my M46A. Tim turned the bolt down for me and it came out great.
I love how light they are and have a nice slender grip. They just feel great in your hand. I put a Timney trigger on mine.
I did a chamber cast of Waynes, M46, and mine, M46A, they both had throats around .370″ and over .5″ long. With loading oversized bullet to fit the throat, you just have to watch for your neck diameter to make sure it still has room to expand and let the bullet go. It sounds like your barrel has a more normal bore diameter, so the regular 9.3 bullets might work better for you.
- October 30, 2018 at 12:18 am #68921
Wayne got Norma brass for the proper head stamp, beautiful stuff, just expensive. So I bought PPU 8×57 brass and necked it up for my jacketed loads. I cut down some 06 brass, sized and turned the necks for the cast loads, just to try it and see how it would work.
- October 31, 2018 at 2:28 pm #68931
i’ve done the ’06 into a 9.3×57 but i didn’t shoot it. i was going to buy a mini cut off saw just for that reason. i have somewhere around 1000 of ’06 cases. i don’t have an ’06 , but my son does. what i do have is a 270. i took a hundred of ’06 rem cases and necked them down to .277″. i know they are short lengthwise but they sure do fire!!!!
about 10 years ago they had a shortage of 6.5 creedmoor brass. so i formed the 22-250 case to 6.5-250(aka 6.5 creedmoor). it was a little short too. i shot them 9 or 10 times. then 6.5cm brass was more plentiful.
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