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Post by k9hunter2 on Sept 3, 2014 13:52:15 GMT -8
I have a BHW 1-9 twist 6x45 barrel that I can’t seem to find an accurate load for. First things first, the upper receiver has been squared, and the barrel has been bedded. The
gun has a free float tube and there is no muzzle brake or suppressor. The gas tube doesn’t feel like it’s rubbing when the key goes back in place. I compared it to my
bushmaster predator and they feel the same. So far there are about 150 rounds through the gun. I shoot one 5 shot group over a 15 minute period. I’m using once fired Lake
City brass and they were annealed, resized and trimmed to 1.755 inches. I resized them with a Forster Full Length die, and seated them with a hornady seater. I’ve tried 55gr
NBT’s, 58gr Vmax, 60gr Sierras, 65gr Vmax, 70 TNT’s and 70gr NBT’s with various powders. For powders I tried 8208, 2230, benchmark and H322 all with rem 7 ½ primers. The
best 5 shot groups I got were right at 1in with the 60gr Sierras using 25 grains of 322. Most of the other groups are between 1.25-1.75 inches. The COAl for all the loads was
2.26 inches. With other guns I can get ½ inch groups with most of the loads that I’ve tried. That being said I’m new to reloading, so if there’s any necessary information I left
out please let me know. My goal is to get groups under an inch at 100 yards. Am I expecting too much or do you have any suggestions?
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Post by GLSHOOTER on Sept 3, 2014 14:10:31 GMT -8
Define how much experince. How did you get the 1/2" groups out of your other rifles?
Where did you get your data from and what have you loaded specifcally? If you aren't loading at the top end of the spectrum the BHW barrel isn't even going to try to perform for you. You don't drive a Corvair on an Indy 500 course.
The shotgun approach doesn't work well no matter what rifle you load for. You pick a bullet and two or three powders and start from there. ADD componet selection never pays.
I've never seen a 6X45 BHW barrel that we couldn't get shooting. Don't worry and we can work you through it.
Greg
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Post by k9hunter2 on Sept 9, 2014 15:51:24 GMT -8
The reloading data was from the reloading sticky on predator masters. I’ve only been reloading for a few months. So far I’ve loaded only a handful of different cartridges: 6x45, 6dti, and 223.
I loaded the 6dti by starting 1.5 grains below max. Some of those bullet and powder combinations produced half inch groups. Some of the 6x45 loads I tried were max loads. I appreciate the help so far. How would you recommend developing a load? How far below max do you start, and what grain increments do you use to go up? My powder list contains:
• 8208
• 2230
• Benchmark
• H322
• 335
• 748
• 2015
• Varget
• 3031
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Post by GLSHOOTER on Sept 9, 2014 17:36:05 GMT -8
The reloading data was from the reloading sticky on predator masters. I’ve only been reloading for a few months. So far I’ve loaded only a handful of different cartridges: 6x45, 6dti, and 223.
I loaded the 6dti by starting 1.5 grains below max. Some of those bullet and powder combinations produced half inch groups. Some of the 6x45 loads I tried were max loads. I appreciate the help so far. How would you recommend developing a load? How far below max do you start, and what grain increments do you use to go up? My powder list contains:
• 8208
• 2230
• Benchmark
• H322
• 335
• 748
• 2015
• Varget
• 3031
I get 6X45 data from Accurtae and Hodgdon about 90% of the time. I usually take a MAX and back it down about 1.0 grains and move up at 0.5 grain increments. I have never hit any over pressure loads doing this. I load to mag lenght or as long as I can. The 55's and 87's get most of my attention. Once I get one that loosk good I'll shoot 0.3 on either side. I use one land no more than three powders on a trip. 100% of the rounds are over a chronograph. I normaly shoot two five shot groups at each level. I'll load ten extra of light charges for sight in. That gives me 100 fired cases. Given your powders I would do 2015, 8208 and Benchmark. I would start with a Hornady 87 grain BTHP for my intial loads, the 55 grain Nolsers or the 58 Hornady. H335 and 748 go crazy in the heat where I am at. Greg |
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Post by klrdrvr on Sept 11, 2014 20:06:10 GMT -8
I've had really good results with my 20" 1x9 bhw barrel. It does however have pretty obvious likes and dislikes. It likes the 87gr hdy, but it wants it no more than .030" off the lands or the groups open up. The COAL to the lands with this bullet in my barrel is about 2.380 so to get that bullet to shoot I have to load it well over mag length and single load off a "bobsled."
The bullet it like best is the 85gr Sierra Game King. It has a much plumper ogive and will shoot .25" 5 shot groups pretty consistently when loaded to a coal in the 2.275 to 2.280 range. The latest bunch of ASC mags I bought will take lengths to 2.290 so all is good. I would suggest doing some careful measurements. You should be able to get it shooting well.
Edit: I'm burning 8208 using hodgdon data.
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Post by GLSHOOTER on Sept 12, 2014 5:29:06 GMT -8
I've had really good results with my 20" 1x9 bhw barrel. It does however have pretty obvious likes and dislikes. It likes the 87gr hdy, but it wants it no more than .030" off the lands or the groups open up. The COAL to the lands with this bullet in my barrel is about 2.380 so to get that bullet to shoot I have to load it well over mag length and single load off a "bobsled." The bullet it like best is the 85gr Sierra Game King. It has a much plumper ogive and will shoot .25" 5 shot groups pretty consistently when loaded to a coal in the 2.275 to 2.280 range. The latest bunch of ASC mags I bought will take lengths to 2.290 so all is good. I would suggest doing some careful measurements. You should be able to get it shooting well. Edit: I'm burning 8208 using hodgdon data. Were those the regular aluminum magazines? They advertsise the SS as doing around 2.318 in the 556. Greg |
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Post by klrdrvr on Sept 12, 2014 7:13:04 GMT -8
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Post by GLSHOOTER on Sept 12, 2014 9:25:50 GMT -8
Greg, they're the SS "marlube" models. The 5.56 versions I got would go to 2.30 - 2.31 in a pinch, but the bullet tip would be scraping the front edge of the magazine (i havent tried the Grendels yet). The 85 SGKs shoot great at .025 to .030 off the lands and don't seem to get better by going closer. With the shape of that bullet 2.275 - 2.280 works really well. That's the first verification I have had on the ASC load lenght. The Grendel magazines are the same. I have about a dozen of them. Greg |
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Post by k9hunter2 on Oct 3, 2014 8:54:27 GMT -8
I tried several loads with 55gr NBTs and 58gr Vmax. I'm getting 1/2-3/4" groups now that i'm loading them .3gr over the listed max from AA. It's amazing how much tighter the groups are now that I'm loading them hotter. Mine seems to like 2230 2015, and I'm still playing around with the COAL. Thanks for all the help!!!
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Post by GLSHOOTER on Oct 4, 2014 5:26:09 GMT -8
I tried several loads with 55gr NBTs and 58gr Vmax. I'm getting 1/2-3/4" groups now that i'm loading them .3gr over the listed max from AA. It's amazing how much tighter the groups are now that I'm loading them hotter. Mine seems to like 2230 2015, and I'm still playing around with the COAL. Thanks for all the help!!! Now you get in teh BHW tradition of posting up pictures of your buold AND th groups. It always gives warm fuzzies when they appear. Congratulations on finding your loads. They do like it warm. Greg |
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Post by GLSHOOTER on Nov 29, 2015 13:06:54 GMT -8
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