Picked up a box of 200 commercial cast bullets. Bullets are 280gr., gas checked. .368 diameter. Label on box states bullets are used for 9.3x57 loads. Any reason why they cannot be used in 9.3x62 cases? I have not found any info on starting loads or what powders work best. Thanks in advance for any information.
9.3x62 Cast bullet reloading
- Thread starter c1a1
- Start date
- Location
- Western Manitoba
If there is a difference - 9.3x57 versus 9.3x62 (and I am not sure that there is, except bolt face to headspace datum / case mouth rim) - look at the "free bore" and lands area - the "throat" ahead of the cutout in the chamber for the cartridge to fit. I think you can find a SAAMI drawing for 9.3x62, but I have not found one for 9.3x57 - and is "moot issue" if no reason to know that a SAAMI compliant reamer was used.
I do know that 45-70 versus 458 Win Mag "throats" are done differently - hence there are bullet noses for 458 Win Mag and difference shape for 45-70 - although typically the bullets can be similar diameter.
In the past I had done a CGN post with pictures of a cerrosafe casting for a Husqvarna 9.3x57 barrel here - the 285 grain, gas checked, lead cast bullets will be out of the case mouth, before the "fat part" of the bore rider bullet hits these lands - so is, I think, more important on this one to have the cast bullet diameter to be very close fit to that "throat" - as there will be a point where that bullet will not be supported by either the case mouth, nor the lands.
Go here to that thread - https://www.canadiangunnutz.com/forum/showthread.php/2166654-9-3x57-sloppy-chamber?highlight=9.3x57 - picture that I posted in Post #28 in that thread.
I do know that 45-70 versus 458 Win Mag "throats" are done differently - hence there are bullet noses for 458 Win Mag and difference shape for 45-70 - although typically the bullets can be similar diameter.
In the past I had done a CGN post with pictures of a cerrosafe casting for a Husqvarna 9.3x57 barrel here - the 285 grain, gas checked, lead cast bullets will be out of the case mouth, before the "fat part" of the bore rider bullet hits these lands - so is, I think, more important on this one to have the cast bullet diameter to be very close fit to that "throat" - as there will be a point where that bullet will not be supported by either the case mouth, nor the lands.
Go here to that thread - https://www.canadiangunnutz.com/forum/showthread.php/2166654-9-3x57-sloppy-chamber?highlight=9.3x57 - picture that I posted in Post #28 in that thread.
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- Location
- Western Manitoba
DGY - for some, might be as simple as to load some up and shoot targets - if grouping is okay for you, then is done - no more fussing about it. It is when you get 6" groups from sandbags for 5 shots at 25 yards (when you had been hoping that all holes would overlap or at least touch to one another) that you decide to try to figure out why that is happening ...
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Not hard to get 285 gr cast lead to 2200 without leading in the '62. Shannon has posted how to do it.
Notice the base of the bullet is not fused at all, corners still sharp and grooves from the rifling the same.
The secret is the cotton patch beneath the cream of wheat. It protects the base of the bullets, and keeps them from melting.
Ted
Notice the base of the bullet is not fused at all, corners still sharp and grooves from the rifling the same.
The secret is the cotton patch beneath the cream of wheat. It protects the base of the bullets, and keeps them from melting.
Ted
Attachments
Okay to clear up some confusion, the cotton patch protects the COW which protects the bullet from melting, AND scrubs the bore clean! I found this nugget of info on Cast Boolits site.
https://castboolits.gunloads.com/sh...d-from-bores&p=2700370&viewfull=1#post2700370
Ted
https://castboolits.gunloads.com/sh...d-from-bores&p=2700370&viewfull=1#post2700370
Ted
Don't forget that the throat on a Husqvarna 9.3x57 is quite a bit longer than the throat of a 9.3x62.
Precision Shooting had an article on this a dozen years ago. The author made up some LDPE plug wads in order to stop coppering from jacketed bullets due to the use of slightly (0.0005") undersize bullets in a 6PPC & a .303 British. Problem solved.
They were going ~3,100 fps in the 6PPC & ~2,500 fps in the .303.
I presume if they would work for jacketed bullets, they should work on cast bullets.
Precision Shooting had an article on this a dozen years ago. The author made up some LDPE plug wads in order to stop coppering from jacketed bullets due to the use of slightly (0.0005") undersize bullets in a 6PPC & a .303 British. Problem solved.
They were going ~3,100 fps in the 6PPC & ~2,500 fps in the .303.
I presume if they would work for jacketed bullets, they should work on cast bullets.
