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6.5X284 load starting point please

 
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  #15  
Old 03-07-2012, 10:44 PM
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Re: 6.5X284 load starting point please

You can use a .001" smaller bushing, but if neck tension is to high it will give you vertical stringing at longer ranges. You can run top pressure loads with many reloads with norma or lapua brass, I feel that the primer pockets in the nosler brass will loosen at high pressures., you will probably find that bergers are usually only accurate at 3100fps in a 8.5 twist, I can't remember if you said you had a 8 or 8.5 twist, if its an 8 accuracy is likely to start falling back off after about 2980ish.
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  #16  
Old 03-07-2012, 11:15 PM
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Re: 6.5X284 load starting point please

I went with the lapua brass because i had read of the loose primer issue with the norma as well and had alos read a bunch of article of bad lots with the norma brass in this particular round. Dont know but that pushed me to the lapua brass.

I have a 1:8.5 twist in mine, you thinking much under 3100 fps the accuracy will be lacking a bit?
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  #17  
Old 03-07-2012, 11:23 PM
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Re: 6.5X284 load starting point please

It is a 1 in 9 twist. I am using a .293 bushing. I have pretty good accuracy with nosler 140 accubonds but I would like something with a little higher BC. and maybe more speed but the speed is not a huge deal.
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  #18  
Old 03-07-2012, 11:24 PM
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Re: 6.5X284 load starting point please

I use the bushing neck dies as well,with a neck dia. of .299 I use a .292 bushing which will usually spring back a bit give me about a .006 neck pressure. For me this works well in a hunting situation. For bench shooting,I usually will be in the .002-.003 range,depending on the rifle.This light of neck pressure can pull the bullet,if you need to eject the cartridge before its fired.As for dealing with pressure issues to gain 100 fps, I dont think it would be worth it for me,to many possible problems for such a small gain----My humble opinion only----What do ya'll think ?
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  #19  
Old 03-07-2012, 11:45 PM
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Re: 6.5X284 load starting point please

The 8.5 twist will stabilize the bergers perfect at 3050fps, its going to be hard to stabilize them in a 9 twist unless the elevation is above 5k feet and MV is >3100fps.
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  #20  
Old 03-08-2012, 12:01 AM
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Re: 6.5X284 load starting point please

They seem to be stable so far at least the first 200 yards. I live at 5400 ft and hunt usually 7000+. I haven't cronographed them but I am using 52 gr of H4831sc on them as well. I just haven't got very good groups yet.
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  #21  
Old 03-24-2012, 08:42 PM
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Re: 6.5X284 load starting point please

Ok finally got the moons and stars aligned and when i got off this morning i got to grab my gun and worked loads and finally get some trigger time behind my 6.5X284.

I loaded up a few loads with the 140gr berger vld hunting bullet, started from 47.5-50.5 grs of H4350, using lapua brass, and CCI BR's primers. I loaded up 7 in the 47.5 and 3 rounds for the rest hoping i could be sighted in 3-4 rounds at most, and that was great.

I had read somewhere these rifles usally peak 2-3 times in a wide spread of load ranges. Here is what i measured.

47.5gr=.442
48.0gr=.413
48.5gr=.648
49.0gr=.527
49.5gr=.449
50.0gr=.900
50.5gr=.794

I had no heavy bolts, took a dial caliber with me and measured all the case's after being shot while letting barrel cool 1-2mins between shots and had no abnormal case expansion and no primers popped out or bulged.

Should i try to work on up some and see if the group tightens up one more time or start at 49.2 grs and work up to 50.0 grs in .2 incriments to find that sweet spot or both?

Please give me your thoughts, also wondering if anyone is using these loads if they have chronographed them to give me some idea of the speed until i get a chronograph myself, all thoughs and feedback will be much thanked, thanks again.
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