"there is nothin new under the sun." New chamberings

nksmfamjp

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If you want to tell me that the 30-06 can do it all or xxx caliber with more freebore, different bullets, different if all a person needs, I get it.
…..but put on a different set of shoes. If you make a standard 270 win that shoots 130’s great, you need a new caliber for your new long range rifle. Maybe a 6.8 Western?

…but let’s say you do as so many here say and launch your super duper long throated 270 Win with a 7 or 8 twist barrel. When you launch, you test with long seated heavy bullets, it is awesome.

Then you give it to Clyde the gunwriter who runs 120 Corelokts through it and short loaded 150 round nose through it, he writes it is unimpressive. Why? Nobody make long 270 win high bc ammo…why? Because they don’t work in short 270’s. So then you need to make another cartridge.

Simple example, but why don’t folks get the inflexibility of mass produced rifles?

That plus opportunity to advertise new is why you constantly need a new round. Look at the new rounds. Most have a lot of commonality with other tooling.

Do you see a way around these hurdles with the current SAAMI system?
 

Mikecr

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Simple example, but why don’t folks get the inflexibility of mass produced rifles?
Most gun buyers don't reload, and most reloaders barely reach basic level.
Do you see a way around these hurdles with the current SAAMI system?
Advanced reloaders could care less about SAAMI.
And those venturing beyond standard factory cartridges are often progressing into advanced reloading.
 

nksmfamjp

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Most gun buyers don't reload, and most reloaders barely reach basic level.

Advanced reloaders could care less about SAAMI.
And those venturing beyond standard factory cartridges are often progressing into advanced reloading.
I agree with what you say.

When I buy a bolt action, I want a well developed chamber design with reasonably priced dies and components.

A couple examples…

300 Sherman vs 30-06 AI….Both have Lapua or Peterson brass available, but 300 Sherman has readily available dies and freebore for VLD’s is set by the designer. 300 WSM is close, but Norma brass is all but impossible to find. For the WSM, 205-215gr mag length bullets sit deep in the case, unless you go long action.

300 Norma Mag….Nice round, but few powders available. Drop down to 28 or 30 Sherman Mag, now there are Retumbo, RL33, and several other good choices.

Now, you could just say th36 are all the same as 300 win mag!
 
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257Tony

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Most gun buyers don't reload, and most reloaders barely reach basic level.

Advanced reloaders could care less about SAAMI.
And those venturing beyond standard factory cartridges are often progressing into advanced reloading.
Bingo. The new fancy PRC type cartridges give the factory rifle/factory ammo crowd some viable LR options.
 

Another Casual

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I agree with the OP. Every time something new comes out we get to hear how a custom gun with the right throat and twist out performs it. Most people are buying off the shelf guns and a few boxes of ammo a year. Look at all the rounds that never took off because they had the wrong twist or weren't throated right.

Sometimes you do need to reinvent the wheel. Say they make high BC 270 factory ammo and still calls it 270 win. Someone puts it in their plain Jane 270 and suddenly you have an over pressure because it's not throated right. Having a different spec that is tailored from the start makes sense for the factory crowd.
 

MagnumManiac

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Interesting, don’t ever consider SAAMI when choosing a cartridge and rifle to go with it.
If I buy a factory rifle, it is 99% of the time a higher end product; Rem 700 Sendero/Tactical/5R, Kimber of any flavour except the Hunter range, Win Model 70’s or older Sako’s.
The only cheaper rifles I have bought that do what they do best and that is their ruggedness are Rugers. My Ruger M77 MK II in 25-06 is not factory, but is a genuine 1/4-3/8MoA performer and is like this with just about any bullet you put through it.
I find it very interesting that the moment a new cartridge is released, so many people read the ads about it and jump on the band wagon about it’s NEW attributes without even having shot one yet and play down ever other cartridge that came before it just because the ammo designer says so.
As soon as this lockdown ends, I will be shooting 3 30 cal magnums side by side to see which one stacks up with the tightest aggregate; a 300Bee, 300RUM and 300WM. I have a clear winner in mind, but we will see how they measure up.

Cheers.
 

rustyshackleford

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To go after the low hanging fruit you tell me what 300 PRC does over 300 WM and what 6.5 PRC does over 6.5-284. The answer to the other part is just shoot a 6.5-284 instead of reinventing the wheel with a 270
 

BallisticsGuy

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Heck
Seems the SAAMI system isn't the problem but rather thoughtless/brain-dead gun writers if OP's post is to be taken seriously. If you ask me the problem is people hand waving over something as absolutely meaningless as .007" of bullet diameter because their particular bullet diameter doesn't offer the world anything special and only makes manufacturer's job harder and more expensive by forcing them to keep yet another specialty bullet in production.
 

mindcrime

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Jun 14, 2002
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middle Tennessee
I agree with what you say.

When I buy a bolt action, I want a well developed chamber design with reasonably priced dies and components.

A couple examples…

300 Sherman vs 30-06 AI….Both have Lapua or Peterson brass available, but 300 Sherman has readily available dies and freebore for VLD’s is set by the designer. 300 WSM is close, but Norma brass is all but impossible to find. For the WSM, 205-215gr mag length bullets sit deep in the case, unless you go long action.

300 Norma Mag….Nice round, but few powders available. Drop down to 28 or 30 Sherman Mag, now there are Retumbo, RL33, and several other good choices.

Now, you could just say th36 are all the same as 300 win mag!
I'm not versed in the Sherman cartridges, but have seen them mentioned often.......

PM. Me some pictures or really good links please. 👍😎
 

cabelasken

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Feb 22, 2021
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Nevada
About 40 years ago the first rifle I purchased for myself was a 270. It was a nothing fancy model 70 XTR push feed. After a year of trying to develop loads for it I discovered that it preferred light loads or anything under 2750 FPS with 130 grain bullets. I also discovered that the chamber was cut a little over spec and if I did the typical resize, brass life was only 3 or 4 firings. So, I backed off the resize to just touching the shoulders and got a little better case life. So with once or twice fired brass, neck sized only, and loaded "down" to 2750 I got 1/4" 3 shot groups and 3/8" 5 shot groups. The only thing I changed on that rifle was installing a Chet Brown fiberglass stock and carefully bedding it to 2" in front of the recoil lug. I honed and adjusted the trigger assembly so it was extremely smooth and broke at exactly 3 lbs. It killed every game animal I used it on out to about 350 yds with one shot. But after 10 years, I decided to change over to a Browning a-bolt in 284 win which loved hot loads.I have now gone thru over 10,000 rounds and two barrels on it and now in need of another barrel! Now there are many more guns in the safes and all have a purpose. I love em all!!!
 

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