6x45 55-65 22"+ Bolt gun

1

10gaugemag

Guest
First time poster and hoping I picked the perfect place to ask for input/advice on a new project.

Looking at having a bolt gun rebarreled to 6-223, be a 22"+ barrel intended for coyote hunting.

I like the idea of running a 55 grain faster than the 223 and possibly the 60-65 grain as fast for coyotes. Nosler lists the 6mm 55 BT as a higher B.C than the .224 55 grain.

In my searching on the net I am not finding much in the way of loads for such weights and when I do they are in a short barreled auto. Also older posts are talking of heavily compressed loads just to get pressure/velocity up with the larger bore.

Anybody using one of these in a bolt gun with said bullets weights??
 
6x45

don't have one. sierra book gives for the 60&55gr. accuracy and hunting load 28.2 gr of 748 this is .8 grains below max. all these are max reduce 10 percent to start. and all 3200 fps in a 24 inch barrel. h4895-28.1gr. h335-27.8gr. h322-25.6g. aa2495br-26.3gr. aa2230-27.5gr. 70 grain bullets at 3100fps. aa2495br-26.4gr. h335-27.7gr. 748-28.0gr. these are max for 70gr bullets reduce 3.0 gr for 65gr bullets to start. none of these loads are for solid copper bullets. hope this helps. there are people on here that may know better powders for this cartridge.
 
philipbrousseau said:
don't have one. sierra book gives for the 60&55gr. accuracy and hunting load 28.2 gr of 748 this is .8 grains below max. all these are max reduce 10 percent to start. and all 3200 fps in a 24 inch barrel. h4895-28.1gr. h335-27.8gr. h322-25.6g. aa2495br-26.3gr. aa2230-27.5gr. 70 grain bullets at 3100fps. aa2495br-26.4gr. h335-27.7gr. 748-28.0gr. these are max for 70gr bullets reduce 3.0 gr for 65gr bullets to start. none of these loads are for solid copper bullets. hope this helps. there are people on here that may know better powders for this cartridge.
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What is max velocity they are showing for the max load of 748 with the 55BK??

Wondering if I would be better to run the 65/70 grain stuff around 3k-3100.
 
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6x45 55-65 + bolt gun

Your close to the old 6x47 We used good old 4198 with great results
try some for accuracy just remember that the case is shorter on the 223 i would guess at starting at 21 grs and work up from there.
Remember to jump the bullet a little bit. about .010 0r so .
 
Sierra lists their test firearm as a Win mdl 70 with a 24" barrel. According to their data, you will lose about 100fps from the 55's to the 70's. Myself, I'd probably go with the 70's if the gun shoots them well. My opinion is that little extra "thump" at only 100fps less is worth it as long as the accuracy is acceptable. Sierra also makes a 60 grain varmint flat base bullet. All should work fine. I'd pick whichever I could get to shoot the best. Btw, they show 3200fps from the 24" barrel with the 55BK as max. Also, if the gun is going to be re-barreled, why not go with something longer then 22"?
 
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Rflshootr said:
Sierra lists their test firearm as a Win mdl 70 with a 24" barrel. According to their data, you will lose about 100fps from the 55's to the 70's. Myself, I'd probably go with the 70's if the gun shoots them well. My opinion is that little extra "thump" at only 100fps less is worth it as long as the accuracy is acceptable. Sierra also makes a 60 grain varmint flat base bullet. All should work fine. I'd pick whichever I could get to shoot the best. Btw, they show 3200fps from the 24" barrel with the 55BK as max. Also, if the gun is going to be re-barreled, why not go with something longer then 22"?
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That's why I put the + at the end of 22". Just put that there to keep people from posting all of the 16-20" stuff being used on the 6-223 ARs.
 
Would rather try the 4198 anyway, not a huge ball powder fan.

The more I dig the more I see this cartridge is best with the 70+ grain stuff just to help get pressure with the heavier bullet in the smaller case.
 
10gaugemag said:
Would rather try the 4198 anyway, not a huge ball powder fan.

The more I dig the more I see this cartridge is best with the 70+ grain stuff just to help get pressure with the heavier bullet in the smaller case.
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With the 70's, if you go with them, I wouldn't rule out H4895 either.
 
You might want to visit the reloading forum on PredatorMasters.com and on its its first page, near its top, you'll find a thread on reloading the 6x45 aka 6mm223. In it you'll find a chart that contains lots of load data for various powders and grain bullets.

OOOOOPs, just noticed JoeS posted where to find the chart I mentioned on Predator Masters Reloading Forum.

Personally, I've had good success for accuracy with Ramshot TAC and 70 gr Noslers in my 6x45 rifle. Accurate/Ramshot/Western Powders doesn't show any load data with TAC powder, a powder I've used for years in .223/308 reloading with decent results. But, does for its Accurate 2200 & 2230 and Ramshot X-terminator. Emailed Western Powders about it and their reply was TAC had too slow a burn rate for the 6x45. This reply was kinda odd to me as TAC's burn rate, while slightly slower than X-terminator, is pretty close to it. Both powders are very small grain ball type powders that meter very very well for me.
 
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A well-respected bullet maker from Casper WY told me about doing the same project (6-223) last winter. He said he loved it for 'yotes and p-dogs. He makes a super-light 6mm (if I remember something like 40-45 gr) bullet just for that gun -- practically just a jacket with a spot of lead in the base. Accurate enough for varmints, explosive on impact, and easy to load for -- with a capacity to caliber ratio as it is, he couldn't find any load that would over-pressure the case. I think he even tried some pistol powders.

Rod
 
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