6BR vs 22BR

[RAG]

I shoot 53vmax in my 22br 1-12 at a bit over 3800fps and this is out of a 23.5" bbl. 26" would increase that a bit.

Yeah, I like that. The actual G1 BC is something like .252, but that still beats my 6BR LT32 pet load with 58 v-max at 3,830 FPS (.232 "really G1 BC). But is 1/2 barrel life with it? Maybe. Ha! (And, I can run into the 3900s with Xterminator/2230 and only give up about .1" average group size).

Fwiw, I loaded the same piece of brass 10 times in a row, at over 3900, and there wasn't even the slightest sense of primer pocket loosening...and the entire lot already has 15 stiff firings ot so. 6BR + Lapua brass = king of varminting rounds in my opinion.

 

[RAG]

I
Also, I do a lot of ground squirrel shooting that requires lead-free. My last couple 6BRs were 14" twist, so I wasn't able to shoot lead-free out of these setups. I might chamber up a faster twist to push the 55 Nosler ballistic tip lead free. They claim a .288 G1, so even if it's only a .26 in actuality, pushed 3900 fps with 2230 would be one heck of a flat shooting cartridge! Pretty good in wind out to 400 or 500 too. But I hate to build a barrwl around a single bullet, although otherwise I suppose it would be good for the 65s and 70s in lead id thw Noslee lead-free didn't shoot.

 

[JSH]

Bowring......I put together some loads to fireform some 22BR. I did some with my tried and true 4198 and 40 grain BK’s very good results.
I did as suggested with the H335, .02 at a time up to Sierras book max. I shot one of each, 14 total, all into 1/2”@100. I didn’t chrono any today, but will later when I do some target work at 200 to see if there is any change.

Buddy said it was pretty blasty with a fireball, barrel is 27”. This was a new batch of H335. I may crack open a jug of H335 that a BR gent gave me, he said it was a magical lot of powder, we will see.
Jeff

 

[urbanrifleman]

I can get 3950 with the 50 TNT and Blitzking in my 26 inch 223a. It shoots very small with LT32 and Aa2015, r10x, h335.

Lake City brass is cheap. I run 223 and 223a on my Hornady progressive with case feeder and I can run 300 an hour.

My friend David Tubb has a 22xc reamer.... hahaha this might be fun.

If I was going to make a reamer I would make a 22bra. No downside to the Ackley.

I'm getting a bunch of prefitblanks. So I will be able to make prefits for any make. 22br is one that would be good to have in the reamer stash.

 

[urbanrifleman]

I have 10 6bra zero freebore barrels in stock specifically made to shoot the 55 grain varmint bullets jammed into the lands, and no one wants one!!

 

[Mark W]

I have 10 6bra zero freebore barrels in stock specifically made to shoot the 55 grain varmint bullets jammed into the lands, and no one wants one!!

Those zero freebore BRAs will shoot 55 to 80 grain bullets just fine.

 

[RAG]

I have 10 6bra zero freebore barrels in stock specifically made to shoot the 55 grain varmint bullets jammed into the lands, and no one wants one!!

It's cause the last too long, lol. I just retired a 6BR (not BRA) after somewhere between 7000 and 8000 rounds because groups had opened up about .125, and was fouling more than I like.

 

[RAG]

Oh, I ran out of Benchmark and LT32, but had A2230 I used to use in 223AI. I rechamberwd a 6PPC barrel to 6BR and fed it A2230...i went all they way up to 4,000 FPS without sticky bolt,,measured with magneto speed, using 55 BlitzKing and 21.75" tube...incredible speed for standard BR. At 3910FPS I shot a .1" group...so I repeated and shot .16". Done and happy.

 

[RAG]

I would concider a 6BRA or 6BRX . I have a 6BRX just load and shoot to FF. No tricks or false shoulders. Dasher ballistics. How about a fast twist for 85-90 gr bullets. The heaver bullets were not meant to expand on small varmints. I think there may be a few that do. Run the drop and wind drift threw a ballistics program. The big difference is wind drift but not so flat.

Hmmm, it sounds like the Sierra TMK do well for expansion on small varmints. I wonder how fast the 6BRX or 6BRDX could push the 95TMK. Maybe 3,000 or a touch more? I'd consider that for the high wind days. Recently chambered up a 6x47 8" twist, but having some regrets/concerns...it's so hard on barrels that it doesn't hold tune for long, heats up fast, and is a finicky shooter in the first place.

 

[RAG]

I shoot 53vmax in my 22br 1-12 at a bit over 3800fps and this is out of a 23.5" bbl. 26" would increase that a bit.

Yeah, this is what I was thinking of shooting, and wasn't sure what velocity to expect. Seems about right, depending on powder of course, since I'm running 55 grain pills over 3900 fps in 22" tube with 6BR+A2230/X-Terminator. Actual radar tested G1 BC of 22cal 53 Vmax is only .2 or .3 over 6mm 55/58 gn pills, but that's still a nice gain. Fairly big price to pay in reduced barrel life I suspect (22BR vs 6BR), but I'll try/pay it once at least!

And I also want to play with the 60TMK in the 22BR. Guessing/hoping 3,650 fps would be attainable, and if so...that would be superior in the wind... with a .31 G1 BC compared with 53 VMax actual BC of .254.

 

[RAG]

Good question. Maybe just to have something different. I looked at it a while back and decided I didn't want to neck down cases and turn necks. 6BR is boring (but I kinda like that kind of boring)

Ha,,,re-reading your post now. There is no doubt I'd recommend the 6BR before the 22BR from convenience standpoint. I just finished necking down 400 pieces of Lapua...no matter what I did (I tried a couple different dies), the process induced quite a bit of runout. Even worse, the neck thickness uniformity was very good (typical Lapua), but after necking down, I'm depressed to find many cases now have necks that vary from .0130 - .0140...too much for consistent neck tension for bushing dies. So now I either need to neck turn, or use expander mandrel every time. Unfortunately. A 6BR avoids this, of course.

But I was wanting another gun, so 22BR should be fun.

 

[urbanrifleman]

6bra zero freebore with 55s at over 4000 with an 8 twist. I cannot seem to convince anyone!!!

 

[RAG]

I have 10 6bra zero freebore barrels in stock specifically made to shoot the 55 grain varmint bullets jammed into the lands, and no one wants one!!

Dang, yeah, I regret to say I ordered 10-twist 6mm blank about 8 months ago and it just now, finally, came in. Painful wait. I have yet to do a fast twist, in a longer barrel, with the light 55s/58s (my 6BRs have been from recycled (rechambered) 6PPCs), but I understand the faster rotation contributes nicely to the explosive factor!

 

[JEFFPPC]

No neck turning needed. Just neck down to 22 , load and go shooting. Reamer cut for a "no turn" neck.
And being that the 6BR is so boring, you build the 22 BR to keep from getting bored. Don't leave home without it.
Only thing is, you don't just throw powder at the 22 BR like you can the 6BR.
You won't find a big enough hammer to beat the bolt open.

22 BR with 50,55 gr bullets...VV135 This will give you decent velocity and outstanding accuracy. I built mine because I had 8 lbs of 748 and it showed great velocity in the 22 b's. I quickly found it did not give the accuracy I wanted. Vv135 was the answer.