Firsst trip to the range with new 6BR. Ho Hum. Pics

[MDM]

Well, I wasn't to impressed with my first testing session. Thought the 6BR was easy to load for? I'm trying different loads of Varget with 450 primers. Tried some 107 SMKs and 87 Vmax, both jumped .020". I shot 4 shot groups. The best groups for the 107s was 29.4g measuring .71". The best with the 87vmax was .65". Some of the groups were plain crap. I think this gun must like lighter loads but I didn't see any pressure signs. My next batch for the 107s will go from 28.2g-29.2g. For the 87vmax, I'll go from 29.2 - 30g. My main goal is long range, so hopefully I can get the 107s to shoot .5" or better.

Here's the rundown...suggestions are welcome.

107 SMK and Varget.
29.4g = .71" Maybe there is a node right under this.
29.7g = 1.65"
30g = 1.34"
30.3g = 1.06" Maybe there is a node coming in a little bit higher?

87vmax and Varget.
30g = .65"
30.4g = 2.3"
30.8g = 3.2"

 

[boogershooter]

I am no veteran shooter. but I kinda liked JB1000br's article on a ladder test. I am currently waiting for a nice calm day to take my gun/scale /primed_prepped cases , a hand seater,and a bunch of other gear to the range to do the test on a rifle I feel has more potetial than is currently demonstrating. Check it out in the search box. Hope this helps ya, Good shooting!

 

[dmickey]

The biggest factor on what bullet weight to use is the rifle's twist rate. What is yours?

 

[MDM]

8 twist.

 

[Josh11]

Try going around 30 grns of powder and closer to jamming the 107s. Im not sure on the v max. Did you try looking on the 6br page? I would start just under the lands. Around .005 off the lands. Also, you might want to make sure your doing your part. This may not be the case but something small will throw the groups. Shot to shot consistency is the key. What stock and bags are you useing? Like dmickey said, Im no pro. Just things Ive learned on here and have applied to my shooting.

 

[MarkS]

MDM,

For my guns the 87 Vmax is a far accuracy bullet are just so so , but are great varmint bullets, if I get 0.5" at 100 yds, and 0.5 moa at long range, I am good. I always start my bullets into the lands about 0.020". Find the best powder change, then play with the seating depth. The 107's should be very good for accuracy. Try them into the lands, it may help. The normal accuracy range is around 30.0 gr to 30.5 gr. I think the Berger are the best long range bullets start with the 108 gr or 105gr.

If I am checking the accuracy of a gun, I try a benchrest bullet like 68 gr flat base, if it does not shoot then something is wrong with the gun.

Good luck

Mark Schronce

 

[Klong]

The Berger 105 and 108's shoot well in mine. I jam the 105's and jump the 108's. Varget will shoot with mine, but R15 and VV540 works also.

Could be a bedding issue.

 

[johara1]

The firt thing is to find seating depth.first off 107 like to be jumped,try .010 in .000 and .010 out and .020 out with the 29.5 of Varget and watch them get small........jim

 

[skeetlee]

Re: First trip to the range with new 6BR. Ho Hum. Pics

here is what i would do

30.2gr of varget
107 sierras
any primer but probably rem 7.5 BR
1-I would find what your max JAM is and load five rounds, maybe even just 4 but load 5 of them at full jam with the load above.
2- I would then load 5 more with the same load but 10 thou into the case
3- Same thing again but 20thou in
4 same thing again with 30 thou in
5- same thing with 60 thou in from max Jam.
Another thing you need to think about is neck tension. I dont know what FL size die you are using but about 2 thou is all i would want to start with.

It is also possible your barrel isnt a varget barrel. if thats the case and the above advise doesnt work out try some RE15 and do the same things. I mentioned 5 shot groups but to be real honest if the first three shot arent looking good, it wont get any better with a 4 or 5th shot. The hole idea there is to save on barrel life. I like 4 shot groups when i am looking for loads. This is just my personal opinion and my personal approach. I am a big nobody so take what i say for what it is worth. Good luck and enjoy! Lee

 

[morpheus]

My current batch of Varget is disappointingly slow, so I switched to RL-15. 30.5 grains with 107 SMKs works very well for me.

 

[MDM]

I was shooting with a bipod and rear bag, pretty much free recoil. I was advised that I could be getting some bipod bounce. I wanted to shoot it with the bipod because I will be shooting it prone in long range steel matches. I may just try sandbags tomorrow, or a firmer grip on the forearm with the bipod. I was worried that if I had sighted it in with sandbags and got good groups, that my groups may open up when I go to shooting prone with the bipod. However, in the prone position the legs of the bipod will be loaded up a bit and I won't get much bounce at all.

Anyway, I loaded nine rounds of each of the following charges - 29.6, 29.8, 30 and 30.2. Each charge will be tested with three rounds each at a .010 jump, a kiss, and a .010 jam. Hope I can find something.

 

[MarkS]

MDM,

Work your load up with sand bags and zero with bi-pods. You can't shoot bi-pods free recoil. every shot will be in a different place. To shoot little bug holes everything has to be the same, every time.

Mark Schronce

 

[Josh11]

Check this out.

http://www.6mmbr.com/TacticalFroggyA1.html

Part one and two. A must read for bipod shooters.

 

[BoydAllen]

Free recoil is a technique that should be reserved for rifles that are balanced, stocked and supported in a manner that is suitable for that technique. Most shooters would be much better off if they had never heard the term. Make sure that your bipod is mounted so that the legs fold forward. Put a couple of thicknesses of bath towel under the legs if you are on a hard bench. Shoulder it, lightly cheek it, avoid down pressure with your trigger hand or face. You can pull it into your shoulder with your second and third fingerrs. Keep your rear sling stud clear of the rear bag, during setup and recoil. Don't let the back of your pistol grip rest against or recoil into your rear bag. Make sure that you are not putting any side pull on the trigger. It should make contact half way between the tip and first joint of your index finger. Don't palm or grip the stock with your trigger hand. Practice dry firing a lot. Watch how the cross hairs move when you do. When shooting from the bench you should gradually add pressure to the trigger and not know exactly when it will break. Do the same thing for every shot. Put something out so that you can see what the wind is doing.

 

[6BRinNZ]

Hi MDM,

for WIW this is what I have learnt

"Its easy to load for" is a relative phrase, even with a 6Br the smallest things make a difference.

Don't confuse the capability of the gun/load with how you want to shoot. e.g if you have vertical in your group even with a 6BR you still have to do the normal things to remove vertical. i.e. I know from a bipod and a sand sack on a bench I can shoot 10 shots under 1-1 1/4'" consistently at 200yrds. Doing the same thing prone I can only keep it just under 2".

This has lead me to exactly the point that MarkS stated "Work your load up with sand bags and zero with bi-pods".

I only mention this as after trawling this site I went down the track of trueing and blueing a Howa in 6Br and figured it was going to be easy to shoot small groups and hit varmints at large distances...well I have sure learnt a lot .