243 Fury and 243 Fury AI

[Waltersobchak]

Ive been hot Roding the 277 fury sig brass for going on 3 years, from 22 creed to 8.6 and 308 and I can say hands down the easiest and best performance im getting is with 243. It's incredible easy to get to shoot well. All you need is a full length 260 sizing die and a full length 243 die and an annealer. For a barrel im using a factory 1/8 twist 243 tikka barrel. Here's some load data and results with a 105 Berger and h4350. obviously find the pressure your comfortable with. I started at 43 grains and went to 47.5 before backing off to 47 grains and seating it a CH off the lands.

 

[Waltersobchak]

here's the rifle im using. with a 20 inch barrel its doing 3260. after getting it zero'ed. we plugged the data into AB and went to 741 on a zone steel and got a first round impact. I've shot this target a lot, with a lot of accurate and efficient set ups and never have gotten a first round impact on it. theres something magic about getting a 106mm going above 3200 FPS. I call this the 6 UM we have at home.

 

[Waltersobchak]

here's the load data if you anyone wants to give it a go. I currently have another factory barrel at UM getting chopped to 16 and rechambered to 243aI and throated a little bit. the hope is to match, or exceed this velocity, say around 3300 out of a 16 inch.

 

[h2so4]

“The 6 UM we have at home”

 

[z987k]

You're not getting chamber etching? Or youre just going through cheap tikka barrels and dont care?

 

[eric1115]

This gives me a tingly feeling in my tummy.

Any thoughts on barrel life?

 

[JMundy84]

Man this is giving me so many ideas is the .260 die just a step in sizing between .277 and .243?

 

[Waltersobchak]

Man this is giving me so many ideas is the .260 die just a step in sizing between .277 and .243?

yah its just for stepping it down. I tried to go directly to 243 and it was giving a soft shoulder and wouldn't chamber.

 

[NRA4LIFE]

If you can get a 106mm at that rate, the military may be calling.

Tongue in cheek of course.

 

[Waltersobchak]

You're not getting chamber etching? Or youre just going through cheap tikka barrels and dont care?

at this velocity and cost of barrels, im not super concerned with barrel life or the etching in the chamber. as the saying goes, im here for a good time not a long time, especially with hunting rifle barrels.

 

[JMundy84]

yah its just for stepping it down. I tried to go directly to 243 and it was giving a soft shoulder and wouldn't chamber.

Would you get the same results using a bushing die and just stepping down the bushings?

 

[z987k]

at this velocity and cost of barrels, im not super concerned with barrel life or the etching in the chamber. as the saying goes, im here for a good time not a long time, especially with hunting rifle barrels.

I dont think throat erosion is possible to be a problem with this cartridge. I did 2 barrels, neither chamber lasted 100 rounds.
Barrels have to be quite cheap at that rate.

I actually have another unfired and I'm still debating spinning it on and running non hybrid cases.

 

[Waltersobchak]

I dont think throat erosion is possible to be a problem with this cartridge. I did 2 barrels, neither chamber lasted 100 rounds.
Barrels have to be quite cheap at that rate.

I actually have another unfired and I'm still debating spinning it on and running non hybrid cases.

what were you loading? was the issue that you were having issues with extracting? do you know what case head stamp your brass had? ive shot thousands of rounds with the sig brass over the last few years, and haven't had issues with the chamber cutting.

 

[z987k]

what were you loading? was the issue that you were having issues with extracting? do you know what case head stamp your brass had? ive shot thousands of rounds with the sig brass over the last few years, and haven't had issues with the chamber cutting.

277 fury. With the hybrid brass from American reloading. Yes the chamber would etch, creat a line you can feel with a pick and you couldn't extract a case without a lot of effort.
Run the all brass case in the same barrel woth the etched chamber and it runs fine.