CNC heads - a thing of Beauty.. part 2: results

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Jenks

Re: CNC heads - a thing of Beauty.. part 2: results

#11 Post by Jenks »

Gun Pimp wrote:The 'vertical' in the 'solids' group simply indicates that the rifle is out of 'tune' - which you would expect if you'd simply replaced the A Max with another bullet - whereas I assume you had tuned it for the A Max.

I've had a few of these 'solids' in the past but I must admit I'm a bit reluctant to try them - a bit like button-rifling your barrel every time you pull the trigger!

I think we will need shallower grooves if we are to shoot these bullets regularly. Also, what solvent do we use to get the bullet-metal out of the barrel?

Cheers
Vince
Interesting article here.... http://www.6mmbr.com/verticaltips.html


Jenks
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Re: CNC heads - a thing of Beauty.. part 2: results

#12 Post by dodgyrog »

Apparantly Barnes bullets shoot better if .050" (or more) off of the lands - that's a long way when you're used to .002" or less. I believe they put out advice on how to load their bullets.
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Jenks

Re: CNC heads - a thing of Beauty.. part 2: results

#13 Post by Jenks »

dodgyrog wrote:Apparantly Barnes bullets shoot better if .050" (or more) off of the lands - that's a long way when you're used to .002" or less. I believe they put out advice on how to load their bullets.

Yes, I was aware of that. see the thread from Guntrader that I have just found.

http://www.guntrader.co.uk/phpBB3/viewt ... 14&t=53531


Jenks
Gun Pimp

Re: CNC heads - a thing of Beauty.. part 2: results

#14 Post by Gun Pimp »

Jenks wrote:
Gun Pimp wrote:The 'vertical' in the 'solids' group simply indicates that the rifle is out of 'tune' - which you would expect if you'd simply replaced the A Max with another bullet - whereas I assume you had tuned it for the A Max.

I've had a few of these 'solids' in the past but I must admit I'm a bit reluctant to try them - a bit like button-rifling your barrel every time you pull the trigger!

I think we will need shallower grooves if we are to shoot these bullets regularly. Also, what solvent do we use to get the bullet-metal out of the barrel?

Cheers
Vince
Interesting article here.... http://www.6mmbr.com/verticaltips.html


Jenks
Jenks - good article - which every shooter should read but my point was - no 'vertical' with the shooter's usual bullet, so we can assume that the 'faults' mentioned in the 6mmBR article don't come into it.

But, when using the solids, 'vertical' is present - i.e. the rifle is now out of 'tune' with this bullet/load.

Cheers
Vince
Jenks

Re: CNC heads - a thing of Beauty.. part 2: results

#15 Post by Jenks »

Gun Pimp wrote:
Jenks wrote:
Gun Pimp wrote:The 'vertical' in the 'solids' group simply indicates that the rifle is out of 'tune' - which you would expect if you'd simply replaced the A Max with another bullet - whereas I assume you had tuned it for the A Max.

I've had a few of these 'solids' in the past but I must admit I'm a bit reluctant to try them - a bit like button-rifling your barrel every time you pull the trigger!

I think we will need shallower grooves if we are to shoot these bullets regularly. Also, what solvent do we use to get the bullet-metal out of the barrel?

Cheers
Vince
Interesting article here.... http://www.6mmbr.com/verticaltips.html


Jenks
Jenks - good article - which every shooter should read but my point was - no 'vertical' with the shooter's usual bullet, so we can assume that the 'faults' mentioned in the 6mmBR article don't come into it.

But, when using the solids, 'vertical' is present - i.e. the rifle is now out of 'tune' with this bullet/load.

Cheers
Vince


Vince..

the rifle is now out of 'tune' with this bullet/load.
Yep, I reckon you are probably right. I messed around with the Barnes bullet until I had used up nearly two boxes of bullets, never did get it shooting as good as the load and bullet I was already using :( so I gave up.


Jenks.
Westy

Re: CNC heads - a thing of Beauty.. part 2: results

#16 Post by Westy »

Thanks all.

BTW I used a ten thou jump even though i typed a thou. I will endevour with a bigger jump

I had seen the 6mmbr stuff before I don't believe this to be the case with this rifle as it can cloverleaf most other bullets I use. I tend to use the 140 amax and as you can see form the group at 200 yards its not too shabby. I can get similar with, 140 matchkings, 100 grain hollow points, that I use when foxing with this rifle, and I have had good results (out of badness as much as anything else) with 160 grn round nose. So its pretty bullet agnostic. Its a select pacnor barrel too which I use on this and my 6mmBR with excellent results. (BTW the BR with 75 grain bullest will put 10 through the same hole at 100 in an undergroud range so the make and quality of barrels I dont think is an issue)

I really think its as simple as needing to dick about a bit with loads and jumps.

Remember its only1 group of 5 your looking at so I would not jump to the comclusion it vertical stringing. I need to test other groups, Imagine the lowet s one i pulled and it would have been up and left of where it was. It would not look vertical then so all we can say is currently the group size is bigger. Hoever if I had done 5 lots of 5 and they all strung vertically that would be a different matter,
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