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I have a 9.3x64 built on a mauser 98 action. The magazine will allow cartridges up to 3.35" long, no more. I have been using a variety of bullets including 250 gr from Nosler, Barnes and Swift. 270 gr Speer. 286 gr from Hornady and Nosler and 300 gr from Swift. All shoot well but for hunting in North America I've narrowed it down to the 250 gr Accubond for open country shooting and the 286 Partition for closer range in the bush. I have tried a variety of powders with both of these Nosler bullets in an attempt to find loads that will shoot to close to the same point of impact. According to Nosler IMR 4350 is "The" powder for the 286 gr. Not sure how they get 76 grs of it in the x64 case. IMR 4320 shoots very well with the 250 gr Accubonds and pretty good with the 286's. Then along came IMR 4007 with a burning speed between 4320 and 4350 and super short cut granuals of powder. This worked out perfect. The 286's were zeroed @ 100 yds and the 250's were about 2 in high @ 100 and zeroed @ approx. 225 yds. Now my problem,,,,,,, they have discontinued 4007. I've tried other powders with burning speeds between 4320 and 4350 ( H380 and Fast lot WC852) and while they group OK with the 286 gr bullets the point of impact is almost 12 inches below the 250 gr. I guess my next step is to try some more RL 17 or the new IMR 4451. Both have burning speeds close to IMR 4350 but both have small granuals so maybe I can get one of them to work. Could someone with quickload give me a bit of help. The 9.3x64 has a CIP max pressure of 63,000 psi. I'm assuming that 76 grs of IMR 4350 under the 286 gr bullet would come close to that. I'm wondering how many grs of RL17 would it take to achieve the same pressure and what would the approx. velocity be ?? RWS cases would be used for both with the COL = 3.35". I would really appreciate any info you could pass on. Thanks
I suspect IMR 4451 will be close to RL 17. Looking forward to it hitting the market also.
 
Posts: 2443 | Location: manitoba canada | Registered: 01 March 2001Reply With Quote
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I am interested too. One of the common choices seems R15.
 
Posts: 701 | Location: Germany | Registered: 24 February 2006Reply With Quote
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RL17 is very good w/ 286s in the 9.3x62.
Barsness says Varget for the 250g and BigGame for the 286 in the 62.
I would think either RL17 or BigGame would work in your 64.
Based on what (little) I have read, I think the 4451 will be closer to RL 15,Imr 4064 or Varget. Accurate shooter/6mmbr.com had a short write up on it in the 'Daily bulletin' section.
 
Posts: 1991 | Location: Sinton, TX | Registered: 16 June 2013Reply With Quote
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Texas Its easy to find a powder that works with one bullet. Not so easy to find a powder that groups 250 and 286 gr bullets close to the same point. If 4451 does turn out to be a little faster it may be worth trying. Looking forward to seeing a burn rate chart with these new powders in it. In the meantime I think I have located a couple lbs of 4007. Hope that works out. I have not tried BigGame in the 9.3x64 but it may be worth trying. Thanks for the input guys.
 
Posts: 2443 | Location: manitoba canada | Registered: 01 March 2001Reply With Quote
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IMR 4350


Mike

Legistine actu quod scripsi?

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.




What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10164 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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Mike Nosler lists 76 grs of IMR 4350 as max with the 286. 72 grs in RWS cases is already heavily compressed in my rifle and that load is about 6 inches low at 100 yds compared to the 250 gr and 4320. 4320 and RL 15 are both much better with the 250 gr bullets than 4350 is.
 
Posts: 2443 | Location: manitoba canada | Registered: 01 March 2001Reply With Quote
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