Next Sin Cartridge?

[bigngreen]

Looking at the RUM and Norma Mag stuff they both did a 375 cal, I've heard tails that the 375 NM is awesome. Some seem to think LR glory is about to come to the 375's, with the correct bullets like say the CE 320's could be awesome
Though there will likely be more guys willing to have a 7mm or 30 cal rechambered than want to take the added expense of playing with the 375's.

 

[hypersonic]

35 cal = 35 wheelen.... uhh...do whut sir? Cross post? Love the wheelen... for its niche

Gary

Have one too and like it but performance should be able to be increased with out issue no belt not a cross post just crossed eyed. Not crossing my fingers though would not be popular for reaching way out versus others with high BC bullets perhaps the 225 Abond would be a good starting point but a good 225 or 250 or 300 grain for that matter would trump it in .338 without much problem. Have you looked at the capacity of the Sin case versus the Whelen?

 

[diriel]

Was half joking tbh... there is less then zero comparison between an 06 case and a RUM case

Have a good one,
Gary

 

[Long Time Long Ranger]

RockZ, Nothing to worry about. You will do just fine with your new 7mm. I have never shot the improved version. But if it increases the standard 7mm-300 winchester 100 fps you are right on a 7mm-300 wby or 7mm STW. The 7mm-300 win mag is 100 fps faster than the 7mm remington and 100 fps slower than the 7mm STW and 7mm-300 Wby. I am not saying it is not a good cartridge because it shoots very well. But the SIN is one of those short fat cartridges that is very efficient and 12-15 grains more powder than the 7mm-300 winchester so performance would be quite a bit more on average. The SIN is the same length as a 338 winchester approximately. I have tons of wildcats done through the years and they are not bad rifles all of a sudden. But with new cases available and new powders coming out regularly things change as to what is best at the time. Doesn't mean the others are bad just something else comes down the pipe that beats it a little.

The 375 at this time is better than the 338 for long range big game performance wise. My 378 wby is now sheer terror on long range elk with the new high bc bullets available. The problem is recoil in a hunting weight rifle. In my ten pound rifles the 378 wby with heavy high bc bullets will rock you. Even more so than the 338-378 wby. That is why I haven't gone to my 378 wby. I have two 358-378 wby's that are fun to shoot with the 225 AB's and they will destroy an elk inside 1000 yards. Just no bc's for this one to go further. The wind kills it.

 

[diriel]

LTLR nailed the point I was half jokingly hinting at on .35 cal. Real good at killing things though. And the point of getting rocked is all too true!

Have a good one,
Gary

 

[WyoElk2Hunt]

What does SIN mean? I enjoy this thread and I am excited about SIN cartridges but curious where SIN came from?

 

[royinidaho]

Chimin' in here.....

As the 277 cal again takes a back seat to the "more popular" calibers, namely 264 and 284. I think about reasons why 277 didn't catch on as much. It would seem to me that it a caliber only 0.005" larger than midway between 264 and 284 would provide advantages. Higher bc than the larger , longer barrel life than the smaller would seem good features.

There doesn't seem to be a high bc 277 bullet from any bullet maker that can't be pushed to destruction at extreme cartridge velocities. I notice bigngreen mentioned the 165 and 175 Matrix and 169.5 Wildcat bullets. Those are great bullets but will not endure the hardships of 8 twist, 3 groove, extreme velocity environment. At WSM velocities these bullets are nearly perfect. But, I don't want a WSM.

The tube on my 270 AM is getting a little long in the tooth. It will be straight forward to rebarrel in the AM chamber. My thinkin' is that the improved RUM case is just a bit too large for the 277 cal. With the best selection of powder that is too much air space remaining. Though accuracy is exceptional ES could be improved. Thus my vote would be for a 2775 SIN.

The interest has narrowed to two animals. Elk and woofs! All others except for a trophy muley are just opportunities. My opinion is that any 277 bullet at any velocity is marginal for LR elk; as evidenced by reports of reduction in number of lost animals by those who have moved up from the 284s to 338s.

Bigngreen has some experimental bullet in hand that if they prove out will be a choice selection for extreme velocity and terminal performance. It may be a pretty big "IF".

Maybe by the time my barrel is finally shot out the 277 SIN will have been born.lightbulb

In the mean time I'm with LTLR with the 375 thoughts for the big game!

 

[geargrinder]

What does SIN mean? I enjoy this thread and I am excited about SIN cartridges but curious where SIN came from?

It's his name. The owner of Sin Arms is Devin Sinner.

 

[WyoElk2Hunt]

Duh that was a no brainer means I have no brain.

 

[diriel]

Naw, it just means you need another cup of coffee. Or maybe a double espresso?

Gary

 

[sinarms]

Thanks everyone for the help and the 6.5 Sin is next, I am sure the others will follow right behind it. I gear my business to helping out the people who have little to no options. When I first started I was the first to offer a match grade barrel as a Savage Prefit (Brux), others have followed now. I am very interested in offering a 270 Sin just to be another option for the 270 shooters.

And yes the name comes from my name, it usually takes most people a couple of times to hear it to make sure that I am actually a Sinner

 

[Nape.270]

I'd take a 6.5 for my wife and a .270 for me.

 

[bigngreen]

What bullet would be most usable in the 6.5 Sin that would survive the velocities?

 

[diriel]

Man I hope I don't Step Right Off INNIT....

Part of a bullet staying together is Jacket Deformation, and what / how the Rifling affects the bullet jacket. Over on one of the Bench Rest sites there was a long discussion with a lot of documented experimentation about this topic. I can not find that link right at the moment, but if you google it you may find it.

Basically, it was Kinda More or Less Agreed that a 6 groove or more barrel will *Usually* be more "Kind" to the bullet jacket, and thus allow more speed, and a higher Bullet RPM. 2 and 3 groove barrels tended to really hammer the jacket. The 4 groove barrels seemed to do a little better, some of the 5 groove I think did fairly well, but 6 groove barrels tended to allow for the highest velocity / bullet RPM. In fact Dan Lilja was actually part of that experiment, he supplied numerous barrels for testing, now that I think about it. If any of you know Dan, I am sure he can shed some light on this subject.

Okaay....
Peace Out!
Gary