Rechamber thoughts

[Badnews Bob]

I have an older .223 b/b that just don't shoot to suit me and seeing as I have a .223 that will way out shoot me I am considering a rechamber/ rebore, I have lots of time to consider this as funds are pretty much nonexsitant right now.

One of the TCU chamberings is what I am looking at, I have a good supply of 6mm bullets left over from a .243 so that is a choice. I don't have a .25 or 6.5 but I do have a swedish mauser 6.5x55 going together and I have a 7x57 and a 280 rem to cover 7mm, So .25 or 6mm is where I have been looking. I like light recoiling rifles, not that I am recoil sensitive I just prefer to shoot them, ( I also have a 376 Steyr) Also 300 yards is the max I will probably shoot this rifle. I want to keep the .223 parent case. Also will the .25 or .243 be enuff to clean out the .223 bore?

 We have .25, 6mm, 6.5mm, 7mm, Thoughts? Opinions? Input desired. Thanks friends.

[sonofafish]

Badnews, I just got a 223 wssm  and man it is a hot and low recoil. I would check in to that it is faster then a 22-250.

[quickdtoo]

Bob, Fred M has a 6x47 Ultra, one more to consider. http://www.angelfire.com/ma/ZERMEL/6x47html

http://ammoguide.com/?catid=399

Introduced in the early 1960's, the 6x47mm was intended as a benchrest cartridge that would equal the accuracy of the best .22 cal cartridges as well as take advantage of a rapidly expanding market of higly-efficient 6mm bullets. The preceding decade had brough a shift of popularity from .25 caliber rounds to the 6mm bore, starting with the .243 Winchester in 1954, and the American shooting public was far from satiated in it's pursuit of this caliber.

The 6x47mm was formed by expanding the neck of the .222 Remington Magnum to accept .243" bullets, benefitting from the greater ballistic coefficients enjoyed by 6mm vs. 5.56mm bullets of the day. The .222 Remington Magnum had been developed as a military cartridge in competition to become the M16's standard chambering and had sufficient case volume to support a larger bullet.

The 6x47mm performed well but had it's detractors, most of whom complained that the round was "finicky" and hard to "tune in". Ultimately, like most 6mm wildcats of the period, the 6x47mm would take a backseat to the 6mm PPC when it appeared and began to dominate the benchrest field.
 

Forget the shortmags, the huge .555" casehead and SAAMI MAP of 65kpsi is just too much for the Handi action, been there done that with a 300WSM.

Tim



http://www.lasc.us/SAAMIMaxPressure.htm

[trotterlg]

There are some real nice cheap 25 cal barrel blanks on auction arms now and I have a 256 win mag reamer............................................Larry

[Badnews Bob]

Quick, I looked at that one also but if possible I want to stay with the .223 case being as I have allot of those on hand and plenty more to be had at any range.  .222 mags just are not as plentiful ya know.

[quickdtoo]

There's also a 6x45. 

Tim

http://ammoguide.com/?catid=237

The 6mm-223 Remington, also known as the 6x45mm, came into being in late 1965, shortly after Remington introduced the .223 Remington as a sporting round. Various experimenters built rifles for this cartridge for benchrest or varmint shooting. Jim Stekl, then manager of Remington's custom shop, set an IBS 200 yard Sporter aggregate record of .3069 MOA in 1973 using the 6x45mm.

For a time, some owners of AR-15 rifles rebarreled their rifles to this caliber for use in NRA National Match Course competition. However, the 6x45mm can not compete successfully with the 7.62x51mm NATO (308 Winchester) round at ranges beyond 300 yards.

After its brief flurry as a benchrest and match cartridge, the 6x45mm has now been relegated primarily to the varmint cartridge role, used by those who want more power than the .223 with the added advantage of being able to use cheap military brass for forming cases. Reloading dies are available from RCBS and chambering reamers from Clymer.

[Badnews Bob]

That looks better because you can use mil brass also, the TCUs are not recomended because of forming issues.

 Think Wayne can clean up the .223 bore with a 6mm?

[quickdtoo]

If Fred's gunsmith can do it, Wayne should be able to do it too I would think. A quick email or phone call would answer that tho.

Tim

[Badnews Bob]

That may as well wait till after the first of the year and I can go back to work.  It's all daydreaming right now and boy do I have plenty of time to do that.

[krod47nw]

Of the choices of bore that you give, I would look at a 257 Roberts, or 6mm Rem.  Both are great rounds with low recoil.

Kevin

[Badnews Bob]

also agree those two are great rounds Kevin But I'd like some more input on the .223 parent case rounds first.

[eskimo36]

i have currently 6x223 in a sako and 7 tcu in a contender carbine and both are great.  The kids love them.  I would even consider 30x223 if i was you.  The 7 tcu or 7x223 is probably the easiest and most versatile.

[Badnews Bob]

.30x.223 I haven't seen yet, I may ahve to look at that, Will it shoot the heavy bullets?

[mitch132]

I bet a .30x.223 would be similar in performance to a .300 Whisper aka .30x.221 Fireball, or even better. For heavy bullets it requires a 1 in 8" or faster twist barrel. Look at information for that cartridge and you can probably squeeze a bit more out of it. But cartridges like these may fall short of your 300 yard goal, at least for larger animals. My vote would be for the 6mm to 6.5mm range.

[eskimo36]

It has been my experience that all will shoot accurately to 300 yards, but none are 300 yard sledgehammers... the 30x223 can be loaded using 300 whisper dies which are getting fairly common. A 1-10 twist will shoot 200's and some roundnose 220's and 1-8 twist will shoot the 240 grain bullets.  the 7 tcu stuf is everywhere that has contender listings.  I have shot coyotes with all at that distance but not deer.  My kids have killed deer to 150 yards with the 6x223 sako using broadside through the rib shots.

[Badnews Bob]

Very interesting, I am still looking at that smaller calibers thou cause I already have the big bores covered.