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6-284 ready for delivery

Lrpv,
Do yourself a favor and try Ramshot Magnum as Johnmeyer mentioned earlier.
It has worked well for me as also. After a few hundred rounds I'm still using the same oal and getting great accuracy.I have not had to chase the lands at all.
I'm getting 3395fps with 107 smk's with an es of 8.
It is a hot load but no heavy bolt lift or case head expansion.Primer pockets do get looser in 3 firings but hold primers no problem.
Shoots 1.25-1.5" groups at 565yds and 4-5" at 1000yds.
And I'm not a competition shooter. Just a hunter.
In fact I shot an antelope at 750yds and dropped it on the spot.
It is very temp stable as proven by a Barnes bullet study and very consistent.
Even though it is not the most popular powder ,it works great in the big 6mm's
Start at 54 gr and work up until you get the velocity and es you need.
Try .010 and .015 off of lands with the 107smk's initially.
This should end your frustration.
 
Magnum powder it is then. First relatively consistent thing I've put down the barrel yet. Nice velocity too although a 107 at 3476 created a sticky bolt. Extreme spreads in the single digits even if it was only with 3-4 shots it's a lot better than 40-50fps. I didn't have enough time this morning to do too much other run through different charge weights and then retry a few and then 4 shots that came in at 3448,3444,3442,3445. Only problem with that was the group turned out at 2.5" at 222yds. I could finally make sense of the way it was shooting though. It's 2 grouping? The 2 rounds for both 56.9 and 57.5 looked like this: . 1
. 2
58.1 was straight horizontal: . 2 . 1

58.7 changed directions: . 1
. 2

4 rounds at 58.5 made a trapezoid: . 3
. 1
. 4
. 2

So, now is it a seating depth thing or time to be checking out the scope as a possible cause of the change in impact because I know it can't have anything to do with the shooter ;D

53.9-55.7 and then 57.5 grains came into .4" vertical
58.1, 58.7, 59.3 and 56.9 were an inch higher and also .4" vertical

thanks everyone for the help, yesterday Rock and Rich were very helpful getting me pointed in the right direction.
Jason
 
That is a great ES as I suspected.
Now you simply have to do a seating depth test and you will be surprised at how those bullets come together as you change seating depth.
You have completed the first step so don't worry that the group was a little larger than you like.
I'm sure it will come together.
I'll send you a pm soon
 
LRPV,
Glad you're on track. As Rock and I have said, Magnum is a great powder for the 6-284 but no one seems to take notice. Good luck with your loads.
John
 
I know I know. I even read the one of the posts on longrangehunting about it but totally dismissed it because I didn't believe a ball powder could be temp stable. I still can't believe that a just a powder can make that much difference but I'm glad it did. Man I feel so much better today. I'll say right now that I won't ever be so stubborn again but I'd be lying I'm sure. I just wish some of you guys would move to Missouri so I'd have all this knowledge closer to me. I'll be sure to let you know how this thing groups with the seating depth changed.
Jason
 
What ! Live in same state as The ST Louis Rams ? Sorry, go Raiders ! LOL Bullet seating depth for sure . Mine shot great with burn rate from Re#17-Re#19 H4530. All bullets touching the lands. BUT in my 7 WSM A-maxs .020 off lands or forget it. Still haven't found proper depth with Berger 168 gr VLD.
 
I have had great luck with everything A-max or V-max at .o20 off except my 6br which just plain doesn't like the 105 Amax. I blame that on bore dimension. As of right now I'm giving up on the 105 Amax in the 6-284 too. Sierra and Ramshot Magnum seem to be ticket for this one.
 
Did you have a chance to try out some new loads ? Soon my bbl will arrive ,mixed feeling on 6x284. Maybe I'll go to 243 AI ,if I do then I'll have to buy two sets of dies ?
 
I haven't tried anything further yet. Rained this morning and it is looking like rain all week. I have a bunch of stuff do this week with plot tours and have to go walk some fields, kids going back to school this week so I don't when I will get back to it. I'm pretty optimistic now with this Magnum powder. At least I am getting some kind of consistency now.
Jason
 
The shiny new Sinclair concentricity gauge showed up on the big brown today. I put the few rounds I had loaded up to shoot next on the gauge and started rolling. Found part of the problem. Most were wobbling the needle around .004" to .005" and I think one was at .002". So then I checked some sized and ready to load brass and the necks on them were at .001 off and I happened to find one that was perfect so I sat it aside. Next I checked fired brass and all that I checked would just barely wiggle the needle at all so I'd say the chamber is good. Next I seated a 107 into the one perfect case I had and put it on the gauge and came up with .004 run out on the bullet. So I am assuming that my main problem lies with the seating die and/or seating operation.

A quick rundown on equipment.
Sizing dies are Redding. Used the cheap 2 die FL set to do initial size down by running the 6.5 brass into the seating die with the stem removed, then ran through the FL die to finish the neck down.
6.5x284 Lapua brass has been 3x fired since initial neck down and were than ran through Redding FL S bushing die the last time they were sized.

Forster Co ax press was used for the sizing process and bumping the shoulder back .0015"
Seating die is a Wilson with Sinclair micro-top used with 21st Century arbor press.

Chamber neck is .276, fired neck measures .275, Loaded round is .2735-.274, with a .272 (non Ti) bushing giving me cases ready to load with a .272 neck for .0015-.002 neck tension.

I'm going to try some different combinations tomorrow to see if I can find where the problems are but I thought I'd throw this out there just see if anyone has had these issues before. First thing I plan to do is to take off the micro-top and put the original on to see if that might change anything.

I did check a handful of 6br and 22-250 that had been loaded with Forster dies on the forster press and they only showed .002 at the most.
Jason
 
It looks like you are losing a bit of concentricity on sizing, but mostly on seating.
The wilson seaters are supposed to be good, but I haven't used them.
Maybe there is a little alignment problem in the die or stem
I mostly use the Forster dies and usually have good luck.
Try marking the high side of the case neck and see if that corresponds to the high side of the bullet runout.
If so orient the high side on the opposite (facing away from you, etc) when you seat and see what happens.
Try various positions and see what you get.
You can also try to seat in small increments, turning the case 1/3 turn and seat in 3 steps-1/3 at a time.
You can also lightly neck turn a few to get some more perfect cases and see how those work out
Even with the wobble you are getting you still should be able to get some very good accuracy. Heck, I've shot some unreal groups with some loads that had over .007 runout. I could never get that die figured out , nothing worked so I just shot the scrubs that I had.
Still shot 3 shots in 1.25" at 565yds. You just never know.
 
With more practice and 50 sized cases I got 13 with around .001 run out, 6 with around .00075, 17 with around .0005 and 14 nearly perfect. Using the perfect cases and seating a bullet with the Wilson die and Sinclair top I got .004 on a loaded round, with the Wilson die and the original Wilson top I still got .004. Using the plain old Redding seater out of the cheapest 2 die set I got .001. Now I don't know why the problem is there and I don't really care but I do know that just because you buy what is supposed to be the best it doesn't mean that you end up with the best.
Jason
 
Jason,
I had to completely rewrite this as you posted in between my writing :) looks like you got it figured out. I haven't ever found a Wilson die to be bad but there is always a first time, I found in mine the closer to .001 neck tension and only sizing half the neck with the bushing die made a big difference in runout also I found when resizing to run the case about half way through the stroke rotate about 180* and finish the stroke on press seemed to help a lot, similar to Johnny's method. On the rounds that have more runout then you like, while turning them on your concentricity tool when the needle is at its highest grip the head of the case with your thumb and push down on the bullet repeat until it is straight or as close as you can get it, I did 50 6*284 just before my match on the 13th in about 1/2 hour that was finish seating and checking runout and repairing runout. Glad to hear you finally got her to shoot, shot my last match of the season on the 14th, my barrel is toast, I couldn't hold better then 12" at 1K :( even though I have a lot of stuff for a 6*284 I don't think I will rechamber it for that, I think I will go for a 6brx or Dasher. Also I think I may build a long range coyote rifle chambered in the big 6 I will have a life time of Lapua brass for it. Best of luck to you Jason.
Wayne.

P.S I have really enjoyed your thread.
 
I have a theory, it sounds to me like you are not neck turning. if you use bushing dies on non neck turned brass, when you size it you are ONLY sizing the outside of the case neck. this means ALL differences in neck wall thickness are transferred to the inside of the case neck. IMO this will create MORE runout in my experience at least. this is when compared to a plain ole standard die set. bushing dies need to go together with neck turning, IMO. the runout you were getting was typical of what I would see using a standard die set. K&M neck turned brass and loaded with wilson dies my 243 AI shows no more than .001 with most being a fraction of that in total runout.
 
Bozo, it's been an interesting endeavor so far.

Cumminscowboy, you are correct I have not neck turned this brass. I see what you are saying and understand the concept, but the thing I am not understanding (and granted is with a very limited sample) that with the standard Redding die I am only getting .001 run out vs. the .004-.005 with the Wilson. I am still in the process of checking different things but I am wanting to neck turn this brass.

I'm going to send Chris the sleeve out of my 243 Forster Ultra and have him ream it for me so I'll that to seat with. Hopefully Sinclair will take back the Wilson die and top and I'll have an arbor press for sale and just go back to doing things like I used to before this little nightmare.
Jason
 
if the redding die is a standard sizing die with an expander button then that would be exactly what I am saying, because the wilson is a bushing die, unless we are talking seaters here.
 
I used the standard FL Redding to do initial neck down and actually used it again after the cases were once fired. After they were 3x fired I used a Redding FL S bushing die to size the cases without the expander ball so the bushing was the only thing to touch the neck. The Wilson die is just the seater die. I have better things to do than chase my tail so I went on yet another spending spree. I ordered Forster bushing bump die and bushings and K and M turning and expander stuff and getting the Ultra seater made so I'll have all new equipment and start over once again. I can't stand having tools that don't work like they are supposed to. I am pretty sure the Redding stuff is fine and has no problems but I am just more comfortable using the Forster products that I am more familiar with. The Wilson die on the other hand has an issue and it may be something I'm doing but I don't know. I do know that I am no longer going to worry about IT. It was awkward (for me anyway) process and I really didn't like it from the get go. I'm probably the only person in the world to ever have a problem with this stuff but I'm used to being unique.
 
I built a 6-284 and after reading Ironworker's comments on RL22 & RL17 thats all I feed mine. 1-12 twist so I stick with the 66grainers.
 

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