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reamer thoughts for 6MM BRX

jerdebson

Hi all, I am thinking about building a BRX instead of a BR. Bullets.com has the below, is it a good reamer for the below bullets? .082 FB is that enough for the 70 gr NBT? I have a lot of them. I also have 85 gr SGK and 107 gr SMK. The below is a link to it.

http://www.bullets.com/products/t23210

Also looking at the below barrel,

http://www.bullets.com/products/6mm-243-5R-1-8-Twist-28-Finished-1-250-x-5-000-Straight-Taper-to-940-Barrel/T10224

TIA
 
I don't agree with the above. There are just as many opportunities for dies as there is with the dasher. Whidden & Redding (6mmar.com) both make a great 6brx die and for the seater use a Wilson straight 6BR die.

As for load data...it's the same as the dasher. I have a 6brx and a dasher and they are shooting the same exact powder charge...they do eat different primers and seating depths but it's the same.

FWIW....I did one of each just so it would be easier to keep brass apart. I wouldn't buy an 8 twist for a 70g bullet. I'd do the twist calc but I'm thinking off the top of my head you are looking at 9 or 10.

Good luck...can't go wrong with either a brx or dasher in my opinion.
 
IMHO, there isn't a dime difference in the Dasher and BRX. Flip a coin. Mostly, opinions one way or the other are subjective when this is discussed. Bottom line...the best barrel wins this one.
 
First.....if you going to shoot bullets in the 105 gr area you will want fb in the area of 125. Second, load info will be taken from Dasher data with no problems. Third, if you have br dies they will work fine, you do not need BRX dies. SO, how do I know these things? Over 5500 rounds fired from a pair of 6 BRX's over the last 2 seasons. This is real time competion shooting from someone with BRX experience. Not "theorys" from type writer shooters. From 100 yds to 1000 yds. Feel free to PM me for more info.
 
Thanks for the above guys. I just found that reamer and was curious if it was too short, for the 70's to start with. I was considering a .271/.272 neck and a .104 FB also. I know the lead will get longer with the round count and will probably start with the 70's. This will end up being my LR gun with the 6MMAR being mostly short/mid range. I appreciate your thoughts, especially those with time behind a BRX trigger. I have BR dies now. More thoughts?
 
If you size with a 6br die you will get bolt click at some point (mine happened at 3 firings from new brass, I used 6br neck die until I got bolt click just to see how long I could go). You will either have to use a 243/308 fl sizer or buy one specific for a brx.

Freebore, I can't help you just because all I've shot is 8 or 8.5 twist & 105's....I am using a 104 freebore but agree with JeffPPC that 125+ would be better. I'm assuming a shorter freebore would be ideal for the 70's but I honestly don't know how much shorter to tell you because I have zero experience with them or the shorter freebores.
 
The .104 would work for both but it will put the junction of the boat tail below the donut area. I prefer a .140 FB and also have a .170 fb reamer.

You are going to be jumping the light bullets and I would not worry about it.

I know a few guys shooting with a .104 fb and using Berger 108s and shoot a lot of low 1'' groups at 600 yards with them.

A Wilson 6br inline die will not work well unless you want the case sticking out the bottom .100 but it will work.

Thread dies you just space up .100.

I would recommend buying a brx sizing die as it is a pity using 2 dies but can be done. If you are going to use 2 dies size it with the 308 die first before you bump your shoulder back as it tends to pull the should back forward a few thou.
 
Thanks again guys, I am a little confused. You both think a FB longer than .104 is better for the heavy bullets but you use a .104 or know people that use it and do well again using heavy bullets. What am I missing here? I am thinking to use the 70's mostly at the first and get into 107's and 105's at a later time. I want to work up a 70, 85 and 105/107 load. I have lots of everything but the 105 Hybrid on hand. TIA
 
The trend now is for both the Dasher and the BRX is to use longer than .104 tho freebore for long range shooting with the 103 to 108gr bullets. 104fb does work but the longer fb is easier to keep the bullet where you would like it in the case neck.
 
DJ111 said:
What do you plan on doing with it would be the first question.
Click to expand...

Dallas, this build will be my "LR" gun. I have gotten rid of my 6-284's and have an AR in 6MMAR for when I want an AR and the BRX will be my only bolt action for any use I may have, I don't think I will shoot 1K "matches" but will be used for varmints, steel, egg shoots, unofficial local shoots and who knows what. I retire the end of this year and may shoot a lot. Does that answer your question? I have hunting guns but want an accurate LR gun. TIA
 
Jason Boersma said:
The trend now is for both the Dasher and the BRX is to use longer than .104 tho freebore for long range shooting with the 103 to 108gr bullets. 104fb does work but the longer fb is easier to keep the bullet where you would like it in the case neck.
Click to expand...

+1 on what Jason said. I would recommend a longer free bore. I ordered my reamer with a 135 free bore for the longer 105 hybrids and it will still work fine for 105 BT, 108 BT, 105 VLD or Sierra 107 MK.


Joe
 
If your reamer doesnt have enough freebore, it can be lengthened with a Throater. PT&G makes a nice micrometer Throater.

Don't know why the auto correct on my iPad capitalizes "throater"....
 
If you only plan on shooting long range with it you just as well set it up for the 103-108 bullets. The .104 would suit u alright if you are in a hury for a reamer but if you are going to order one I would recommend a .140 on a 1.563 case length.
If your starting from scratch...I would do a dasher and not look back. You realistically should buy new dies anyway.
 
If you plan on shooting small go with the Dasher and .135+ free bore. Look at the IBS records in 600 and 1000 and Mike and Rodney do well at 600 with a Dasher……. jim
 
Yabut if Mike and Rodney or Jim had shot a BRX using the methodology that they did then the dasher would be the footnote. Neither is a bad choice. I believe the FB is the choice. There was a mention earlier about starting with the short FB and counting on it changeing to acommodate the longer bullet. By the time that throat is out there it will not be in the best shape.
For real good stuff read thearticle/interview with Jim Ohara about setting 1000yd agg. records. Not many(none) like that. He explains everything.
John
 
John,
You know that that's Jim O'Hara posting immediately above, right?
 
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