Originally Posted by Outlaw6.0
I was speaking to the versatility of the 6mm bore vs the 22 caliber bore. (particularly the .243 vs the .223). The .243 has more punch w/o delivering a lot more recoil. The .243 (properly loaded) will reach out quite a bit further & do so more accurately (speaking of wind drift). The .243 offers more energy if you are a hunter. With a factory barrel, the .243 can be loaded with bullets as low as 55grns and as high as 105's. The 223 really depends on offered twist rate. Some manufacturers offer a 1-9 but some only offer the 1-12 which limits bullet selection from 36 to 55-60 ish grains.
On the down side, the .243 will burn the barrel quicker. Barrels are consumable, at least where i'm from. The .243 is a little more costly to feed (bullets & powder).
For the most part, it's up to the end user. For the prairie dogger/ plinker, the .223 will do everything they need. For the hunter looking to stretch the cartridge out a bit, the .243 is far superior.
I have often considered a 6mm Remington, but since I have skills most hand loaders don't have, I'd opt to buy 257 Roberts or 7mm Mauser brass, neck it down so it has a thicker wall in the neck so I can ream the bore of the neck, make a special arbor to fit the ID & then turn it to a perfect diameter for the chamber in my rifle with a perfect wall thickness & perfect concentricity from the inside to the outside of the neck. This would give less stretch in the neck area when firing and less when sizing with a modified sizing die. I like long case life along with accuracy. However, before I retired, I had 46 years in the machine shop trade and can make or do almost anything I want, since I have a small machine shop at home. I may never have a 6mm anything, because I'm old and probably won't have enough time to do everything I'd like to do.
My present desire is to have as much fun as possible with a custom Savage LRPV chambered for the 22-250 with the Dual-Port Left Load, Right eject Target action I ordered a few weeks ago. It should arrive in the next 3-5 weeks.
A 6mm something or other would be my next project if I live long enough. I used to want the faster ones like the Ackley Improved calibers, but decided I don't want any barrel burners.
I addition, I have to drive nearly 100 miles round trip to a decent range, which eats into my available time. Being an old fart slows me down some, but it hasn't stopped me yet.
I really enjoy listening to other peoples ideas.