6x6.8...Updated 11/25

5

5spd

New member
Im posting this for you 6x43 (6x6.8) loaders since as we all know there is no data for this caliber besides what the shooters post up.
My build, 22" BHW P3 1/10" twisted, AR15
Shoots 1"+ w/many powders and much smaller groups with others.
All shot w/bipod, rear on a bag & tucked into my shoulder inside the shooting house over a chrony.
Remington 6.8 brass necked to 6mm. Large primer pockets.
All loads were at 2.260-2.290" in the beginning and down to 2.270" and had loads from 2.250/2.260" also.
All primers including magnums were perfect, no craters, no over pressures. NO FTF, NO FTE all ran in my AR perfectly.
LR magnum primers didn't do much for speed or groups, but I will try them w/more loads.
This will not be a heavy bullet gun, 65g MAX for coyote.
They may shoot better or worse in you gun, I make no promises whatsoever here, use at your own risk/discretion!

I combined all the weights together. Many are the same loads, but shot on many different days to check grouping.
55g NBT:
33g h335, cci200, 3569fps, .520"
33g h335, cci200, 3546fps, .750"
31g w748, cci200, 3159fps, .880"

55g Combined Technology (coated):
30g x8208, cci200, 3208fps, .630"
33g h335, cci200, 3466 fps, .310"
33g H335, cci200, 3529fps, .900"
30.5g BM, cci200, 3413fps, .467"
31g varmint pro, cci200, 3141fps, .627"

55g sierra BK:
33g h335, cci200, 3539fps, .750"
33g h335,cci200, 3583fps, .800
33g H335, cci200,3489fps, .830"
31g blc2, cci200, 3048fps, .420"
32g blc2,cci200, 3142fps, .620"
31g BM, cci200, 3474fps, .350"
31g w748, cci200, 3122fps, .480"
30g imr4320, cci200, 3073fps, .810"
27g H4198, cci200, 3499fps, .950"

58g Vmax:
31g varmint pro, cci200, 3185fps, .577"
30g h335, cci200, 3199 fps, .627"
31.5 x8208, cci200, 2.270" col, 3374fps, .940"
31.5 x8208, cci200, 2.280" col, 3513fps, .900"

65g Vmax:
31g h335, 3348fps, .850"
33g h335, 3532fps, .650"
31g blc2, 3015fps, .750"
31g blc2, 3117fps, .730"
31g X8208, cci200, 3318 fps, 1.200"
30.5 x8208, 3298fps, .880"
31g w748, cci200, 3214fps, .377"
32g w748, cci200, 3242fps, .730"
32g w748, cci200, 2.280"col, 3320 fps, .750"
27g H4198, 3411fps, .580
27g H4198, 3430fps, .990"

HEAVY bullets over the chrony & for groups:
70g NBT, 29g x8208,cci250, 2.270", 3077fps, 1.400"
80g ttsx, 28g x8208, cci250, 2955fps, 2.270", 2.210"
85g tsx, 27 x8208, cci250, 2.280", 1.200"
85g SGKHP, 27g x8208, cci250, 2835fps, 2.270", 2.100"












 
You might want to rethink the heavier bullets. I have shot a ton of the 87 and 90 grain pills with excellent results in all three of my 6X68 BHW barrels. I found the Hornady 87 to do extremely well in 500 yard F-Class matches.

I have the#2 6X68 BHW barrel and across the board I haven't had any shotgun patterns. My brass is all SSA and I use Remington 7 1/2 primers exclusively. Velocities are excellent and brass life has exceeded 12 loadings. Your velocities are very low compared to my results. It may well be a powder choice issue.

Your data is pretty good to have. The guns all shoot with the 8208XBR load under the 58's that we developed for Tactical Ammunition. You might post it up over on the BHW Forum. That should dovetail in well with the other guys loads they have put up over the past two years.

One thing that does stand out that shooting coated bullets on and off will many times be detrimental to groups with or without coating. It is best to shoot one or the other. Also thanks to the lowered coefficient of friction thanks to the coating loads have to be bumped up to equal the noncoated speeds. I have found that 0.5 grains usally does it and then you are often able to bump it a tad more and get even more velocity safely.

Greg
 
Last edited:
Originally Posted By: Cotton243What is your email address? ill send you the data that i have on the 6SPC

Post it up!! I have some data from mine that I already put up and I have some more that I haven't yet. I wouldn't mind seeing a sticky on a 6woa/6spc/6x6.8mm etc for reload data.
 
Originally Posted By: Cotton243What is your email address? ill send you the data that i have on the 6SPC

Done & thanks

MW I agree on that idea also. I was reading the 6dti posts to extrapolate my starting loads.
 
Originally Posted By: deaddogwalkinGive the 75gr bullets a try with 8208. I would guess it will surprise you.

any load data you can share?

5spd, I too took a look at the 6dti data, as well as higher end 6ppc and low end 6br data to come up with my starting points and to give an idea of where max might be. It worked fine for me I just think it would be nice to see a compiled list of data on the other 6.8 variants.
 
I was out this morning testing some 70gr nosler btips.

Loaded to 2.285 oal rem brass, I started at 29gr and worked up to 29.9gr.

22in BHW 6x6.8
cci 200 primer 29.9gr ar-comp

3189fps avg and printed 0.360" group.

I didn't have any swipes or flat/cratering of primers in my rifle. I think I could get another .5gr or so in the case, maybe more with a drop tube. I loaded up some more at 29.9gr and will test them on coyotes. once I narrow down a bullet I will work on dialing in a final load.
 
Last edited:
Originally Posted By: 5spd
32g h335, 3524fps, 1.380"







Wow that's a screamer!! too bad it didn't group any better for you. I just discovered my dad has a half can of h335 sitting at home so I think im going to give it a try sometime. Was it hard to get 32gr in the case? from my research of dti, ppc, and br data I was estimating 28gr start load(same as you did) and max around 30-30.5gr
 
^^^Full case to the top w/h335 in the 6x6.8 is 36.2g. I would expect the 6dti to be a tad more.
This fills it right at the shoulder. I wont go higher than 33g though. My primers show no high pressure here either.
If you have any h4198 give that a try. 27g w/55/65g bullets ran 3400 fps w/no pressure sings at all and gave ne .580"-1" groups in a 18mph crosswind at the range. I would have no problem w/27g & a 70g bullet starting load also.
 
Originally Posted By: Lyons001Watching you update these posts for a while now. Looks like the H335 is what it likes?
H335 is good across the spectrum and shoots very well with all weights so far.
Others that print well and good speed are Varmint Pro/w748/H4198
That xbr8208 shows good speed, but prints all over my targets like it hates to group together.....Bummer.
 
I'm waiting on some 8208 to show up online. That's what I plan to run but i have cfe223 and h4895 that I may try just for the [beeep] of it.
 
In the 6MM DTI my load with H335 was 30.4gr with the 70gr BT’s at 3224 fps average.
My load now with the same bullet is IMR 3031 running 3333fps average but you have to use a drop tube.
So far I have not found any bad loads that won’t stay under MOA.
 
Here is some more loads I was sent from another 6mm x 6.8 shooter:
No guarantees how they do in your gun, use at your own discretion/risk:
His gun is a 6mm SPC, there MAY be neck/case slight differences and is shooting custom barrels & not the BHW P3 barrel. This may be starting point for 6x6.8 shooters.

75gr Sierra HP Varget 27gr 2750 Fed
75gr Sierra HP Varget 29 gr 2950 Fed
75 gr Sierra HP Varget 30.5 3000 Fed Starting to show light pressure
75 gr Sierra HP Varget 31 3050 Fed Max load
58 gr V-Max Varget 31 3130 Fed
58 gr V-Max H322 28 3250 Fed
58 gr V-Max H322 29 3325 Fed
58 gr V-Max H322 30 3450 Fed Slight Pressure sign. Max Load
55 gr Nosler BT Varget 31.6 COL 2.288
75 V-Max Varget 29.5 3046 Fed GM SD 10
75 V-Max Varget 29.5 3029 Fed SM SD 31

1/12/2009 Temp 58 Hum 23% Wind WNW 12 1:8 twist 24" Barlien
95 gr.VLD Varget 27.5 gr 2724 Fed GM 2.88" SD 24
26.0 gr 2550 Fed GM 2.54" SD 17
25.0 gr 2445 Fed GM 2.18" SD 35
95 gr Accutip Varget 25.0 gr 2492 Fed GM 3.09" SD 8
26.0 gr 2566 Fed GM 1.49" SD 22
27.0 gr 2668 Fed GM 1.84" SD 8
Hornady 87 V-Max Varget 25.0 gr 2522 Fed GM 1.16" SD 13
26.0 gr 2616 Fed GM 1.33" SD 33
27.0 gr 2702 Fed GM 2.3" SD 20
Hornady 58 V-Max Varget 29.0 gr 2977 Fed GM 1.36" SD 40
1/13/2009 Temp 34 Hum 22% Wind SE 5 1:8 twist 24" Barlien
87 gr. V-Max Varget 27.0 gr 2733 Win primer 1.75" SD 35
87 gr. V-Max H335 26.0 gr 2715 Fed GM 1.80" SD 12
27.0 gr 2827 Fed GM 2.09" SD 9
28.0 gr 2936 Fed GM 1.82" SD 19
1/14/2009 Temp 44 Hum 33% Wind WSW 9
105 gr A-Max H335 25.0 gr 2480 Fed GM 2.66" SD 12
26.0 gr 2595 Fed GM 1.86" SD 18
Win 748 26.0 gr 2446 Fed GM 1.16" SD 20
Wim w748 27.0 gr 2563 Fed GM 0.908" SD 15
3/2/2010 Temp 50 1:10 Twist Shilen CM 20" AR
75 gr. V-Max Benchmark 26 gr. 2760 Fed GM SD 11
75 gr. V-Max Benchmark 28 gr. 3007 Fed GM SD 28
65 gr. V-Max Benchmark 26 gr. 2750 Fed GM SD 32
75 gr. Sierra Varm Benchmark 26 gr. 2724 Fed GM SD 8
87 gr. V-Max Benchmark 26 gr. 2713 Fed GM SD 24
58 gr. V-Max Benchmark 28 gr. 3021 Fed GM SD 28
3/5/2010 Temp 60 3shot avg. DCM gun 1:10 Twist Shilen CM 20" AR
75 gr. V-Max Varget 28.5 2842 Fed GM cold bore. Shot high SD 30
75 gr. V-Max Varget 29 2932 Fed GM 1.8" SD 29
75 gr. V-Max Varget 29.5 3016 Fed GM 2.1" two were .31" SD 11
75 gr. V-Max Varget 30 3062 Fed GM .947" with two touching .062" SD 8
75 gr. V-Max H335 27 gr. 2887 Fed GM 0.988" SD 15
75 gr. V-Max H335 28 gr. 3005 Fed GM .536" SD 30
75 gr. V-Max H335 29 gr. 3107 Fed GM .909 w/ 2shots .172 SD 14
95 gr. Accu-Tip Varget 26 gr. 2517 Fed GM 3" group SD 31
95 gr. Accu-Tip Varget 27 gr. 2607 Fed GM 2.39" SD 33
95 gr Nosler BT Varget 25 gr. 2415 Fed GM all over the place SD 11
95 gr Nosler BT Varget 26 gr. 2574 Fed GM only 1 shot recorded on Chrono ?
95 gr Nosler BT Varget 27 gr. 2587 Fed GM SD17
95 gr. Nosler BT H335 27gr. 2758 Fed GM 1.04" SD 12
95 gr. Nosler BT H335 28 gr. 2834 Fed GM 1.03" SD 28
3/8/2010 Temp 58 3shot avg. DCM gun 1:10 Twist Shilen CM 20" AR SD
70 gr. Nosler BT H4895 26 2551 Fed GM 1.77" 37
70 gr. Nosler BT H4895 27 2684 Fed GM 1.35" 25
70 gr. Nosler BT H4895 28 2826 Fed GM 0.68" 19
70 gr. Nosler BT H4895 29 2943 Fed GM 2.82" 40
75 gr. V-Max H4895 26 2689 Fed GM 1.59 31
75 gr. V-Max H4895 27 2781 Fed GM 1.07 14
75 gr. V-Max H4895 28 2887 Fed GM 1.55 14
75 gr. V-Max H4895 29 3037 Fed GM 1.06 21
3/9/2010 Temp 65 SW 15 mph 3shot avg. DCM gun 1:10 Twist Shilen CM 20" AR SD
70 gr. Nosler BT H-335 26 2774 Fed GM 1.12 60
70 gr. Nosler BT H-335 27 2846 Fed GM 0.547 9
70 gr. Nosler BT H-335 28 2956 Fed GM 1.29 37
70 gr. Nosler BT H-335 29 3079 Fed GM 0.828 46
70 gr. Nosler BT H-335 29.5 3132 Fed GM 1.9 15
3/10/2010 Temp 66 SW 13 mph 3shot avg. DCM gun 1:10 Twist Shilen CM 20" AR SD
75 gr. V-Max H335 28 2978 Win SR 2.75 27
75 gr. V-Max H335 29 3081 Win SR 1.99 4
75 gr. V-Max Varget 30 3007 Win SR 0.92 14
70 gr. Nosler BT H335 27 2815 Win SR Had a double two were .68" 12
70 gr. Nosler BT H335 29 3081 Win SR .563" 4
70 gr. Nosler BT H4895 28 2836 Win SR .434" 24
58 gr V-Max H335 29 3207 Win SR 26
69 Berger Benchmark 28 3094 WSR M. 1.94" 22
69 Berger AA2230 28 3053 WSR M. 1.39" 30
69 Berger AA2230 29 3183 WSR M. 1.79" 8
70 Nosler BT AA2230 28 3042 WSR M. 1.80" 15
70 Nosler BT AA2230 29 3125 WSR M. .880" 26
55 Nosler BT AA2230 29 3232 WSR M. 1.3 18
55 Nosler BT AA2230 30 3326 WSR M. 2.4" 13
69 Berger H335 29 3147 WSR M. 3.75 40
70 Nosler H335 29 3096 WSR M. 1.82 13
70 Nosler H335 29 3131 WSR M. .670" 13
 
A lot of the better groups were with the H335. I have 8208XBR, H335, and H4895 to play with. Once the 8208 gets here i'll start putting together some loads and add some data to this hopefully. Thanks for all the work here 5spd!

edit: shortly after I posted the other day PowderValley got some 8208 and h335 in. SWEET!
 
Last edited:
One thing I noticed is that there's no COAL listed for the majority of the loads posted. We're they loaded to mag length? 2.25 standard? I'm loading some tonight with 8208 and 58g VMAX. Loading from 31-31.5g in .1 increments. Loaded 5 at each weight and 5 different coal for a total of 125 rounds. Should be fun!
 
Back
Top