New round

[catwithboost]

Well after 2 weeks of reading and talking to people I decided on the round I want for my Savage heavy barrel. It is a 6mm-270. Good barrel life and good long range round. Here is what some guys are getting for speed.
55gr-4500+fps
100gr-3500fps
So should be a fun rifle. Sorry for the bad pic used my phone. This is a 6mm-270 I did next to a 243 with same round loaded.

[WDFW-SUX]

Thats a dandy cartridge..

[yorketransport]

Is this any different than a standard 6mm-06?  Either way it should be a lot of fun. What are the details on you Savage project (stock, barrel maker, etc)?

[catwithboost]

The nice thing is going with something like this I can always go bigger. But I wanted something for long range shooting. Some day I would like to try hunting antelope and would like the option of setting back 700yrds and dropping one, Guys say this round is good for 1000yrd shooting so I will feel it will be a good round. Figure the dies are being made for it so it must be half way good. I was going to go with a 6mm-284 but want something that would give for barrel life.

[catwithboost]

Yes it is like a 6mm-06 just more barrel life. I am using a savage model 12 heavy barrel fluted. As far as stock and all that not sure yet. Start with barrel and action first then will work from there.

[catwithboost]

I am a dumb ass I was going to use my Savage Model 16FHSS 204ruger as a donor action. Not thinking I can't I need a long action receiver. So after I get the barrel back I will have to find a action.

[yorketransport]

If those velocities are for real, i doubt barrel life will be very good. The 6mm-284 and 240 Weatherby only hit 3200fps at the top end with a 100gr bullet, and both these rounds are known for being pretty hard on barrels. I would be a little worried about any load data that will get you that kind of speed. The fastest I've ever had a 110gr bullet moving from a 300WSM is 3560 from a 28" barrel. And that load was pushing the envelope a fair bit.

Are you just having you current barrel rechambered, or are you going to put a new barrel on? You can get a new prefit barrel for around $300 bucks and just screw it on yourself if you want ot go that route. Also, the model 12 is a short action. Unless you are going to use it as a single shot, the '06 case won't fit in the mag. You could use one of the 284 Win based rounds. They would fit, but your overall length would be limited in the short action magazine.

I'm not trying to step on your project, just offering another opinion. I actually have a Savage model 16 sitting on my work bench now that I'm going to screw a new barrel onto. I just have to decide what caliber.

Andrew

[yorketransport]

You had you epiphany while I was typing. Where is the barrel at?

[cascademountainhunter]

sounds like its a good one hope ya have good luck with it.

[catwithboost]

I have the barrel sitting here. So ya the new savage 16FHSS 204ruger I have I will sell and use for my build of a long action.

[catwithboost]

Here is a better pic of what the round will look like. The one on the right is a 270 round and the one on the left is a 6mm-270.  Here is theversion with minimum taper and the shoulder blown forward to 40 degrees, and a 270 round for comparison. It holds about 15% more powder.

[yorketransport]

If this had happened two days ago I would have gladly bought your 204 from you.  I was looking for a stainless long action, but decided that I could make do with the short action.

Throw you rifle up in the classifieds and try for a trade. Maybe you'll be able to go straight across for a long action.

[catwithboost]

Ya I will put it up. I dont even have to have a Savage action because I will just have the barrel threads cut.

[JoshT]

Hate to break it to you... but barrel life will be worse than the 6/284... more capacity=less life. I don't think there's any way you'd get 4500 out of a 55 grainer without leaning on the measure a little heavy. And, a 100 grainer at 3500 is really stretching it too... a .25-06 is lucky to get 3400 out of a 100 grainer... and that's the same case with a bigger bore. I know a guy that shoots a 6-06 a lot... he gets a tad better than 6mm Rem velocities... a tad.

My fireformed 25-06AI cases held about 7% more than my standard cases... that means an increase in velocity somewhere around 2%. The 6/284 case and the '06 case are almost identical in capacity... so if you can get 2% more velocity than the 6/284... then you should see about 3200-3250 with a 100 grainer and about 4150 or so with a 55. The law of diminishing returns is a real bitch...

[catwithboost]

then you should see about 3200-3250 with a 100 grainer and about 4150 or so with a 55. The law of diminishing returns is a real bitch...
Even with those # I would be happy. But the #'s I posted I have found a few sites saying the same thing I posted. But like I said even your #'s I will be happy with.