Looking for recommendations on a 284 reamer (print) for Fclass rifle.
Recommended 284 Reamer Print?
- Thread starter 243Mendoza
- Start date
I am a fan of completely cleaning up necks, so I would want a .313 neck. If you are going to use a Berger 180 Hybrid, get a .225-.235 freebore but if you want to use the Berger 184, get a .250 freebore. I don't have a reamer print handy>>>But if you call up Dave Kiff ( you need to talk to Kiff on the phone himself) and ask him for a reamer print with those dimensions, you will have a print in about 2 days for your purview.
NO NO NO>>> If you get a .313 neck, you MUST turn your necks to 12 thousandths neck wall thickness.. After you seat a bullet, you will have a 5+ thou neck clearance..
Your own reamer design?
If you are short on free time and don't want to turn necks: .319 neck, .240 FB SAAMI minimum body dimensions. You don't "need" to turn necks for f-class IMHO. To attract more shooters to the sport, I like to highlight that you don't have to spend all your time reloading for good results. Neck-turning is one of those tasks that can absolutely be eliminated and you can still shoot stellar scores. 600-45X with no-turn necks: yes.
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It’s a JGS with .250 freebore and .319 neck for 184 Berger Hybrids.
I also have this PTG one from Grizzly which has a shorter freebore.
https://www.grizzly.com/products/Bartlein-Barrels-284-Norma-Match-Chambering-Finish-Reamer/T28385
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Me too... I don't turn. I spec'ed a .225 freebore but if I had to do it over again I would have gone with a .250", the reason being that by the time the throat moves out enough to have concerns about enough neck gripping the bullet the barrel is going to be ready to be changed. I run the 184 H at 2800fps.
Robin
Can you explain that comment Matt?
Thanks,
A .498 or .4985 would be better than .500 because if you cut it .500 your primer pockets will loosen up quite a bit faster!
I build on average of 60 rifles a year for 284 based cartridges like the 6mm-284, 6.5-284, 30-284 and 338-284, with a 50/50 split of guys using 284 Winchester brass or Norma 6.5-284 brass, and in every single case, a base diameter less than .500 is always preferred.
All of my personal 284 based wildcat cartridges have a .4985 base diameter, and unless I am running a very WARM load, I can get 15+ firings per case. Others I have seen with a .500 base get 4 to 5 loadings on WARM loads IF they are lucky.
I build on average of 60 rifles a year for 284 based cartridges like the 6mm-284, 6.5-284, 30-284 and 338-284, with a 50/50 split of guys using 284 Winchester brass or Norma 6.5-284 brass, and in every single case, a base diameter less than .500 is always preferred.
All of my personal 284 based wildcat cartridges have a .4985 base diameter, and unless I am running a very WARM load, I can get 15+ firings per case. Others I have seen with a .500 base get 4 to 5 loadings on WARM loads IF they are lucky.
There isn’t anyway i could get lapua brass in your chamber. Every lot of brass i have had measure .499 so yours would require a small base die more than likely.
Most every other print i have seen they have .501. It’s my humble opinion thats why people have short brass life at the 2840 node or the shehane users can’t run the 2930 node.
I have 14+ firing on some brass and they are still going strong. I haven’t lost any brass because of primer pockets based on your assumption.
If my brass measured .499 I would cut the chamber base at .4995 and a light polish after the chamber cut would put it at around .4997 which would be a perfect fit, not too tight and not too loose.
I just measured 10 pieces of my new brass, and it mic's at .4985 and MY chamber is .4990 and my custom die sizes the base at .4985 and works perfectly for me.
That's why I have 4 different reamers just for the 6mm-284, so it allows me the ability to match most any brass out there.
I just measured 10 pieces of my new brass, and it mic's at .4985 and MY chamber is .4990 and my custom die sizes the base at .4985 and works perfectly for me.
That's why I have 4 different reamers just for the 6mm-284, so it allows me the ability to match most any brass out there.
Hence
Hence why i believe some have issues with the 284 or improved ones. Chamber is oversized and the dies are sizing them to much and losing primer pockets.
Hence why i believe some have issues with the 284 or improved ones. Chamber is oversized and the dies are sizing them to much and losing primer pockets.
I found the .500” didn’t work as well with FL Wilson or Redding dies, specially after the 5-6th firing the Die wasn’t sizing at the .200” line and I was getting serious clickers on extraction...Went to a .501” reamer and just with the extra .001” my dies were sizing at the .200” line and had no clickers on brass fired 10 times... JME
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