Home Forums Hunting & Shooting Custom Rifles & Wildcats Things I have learned.

When I told my smith what I wanted to do I kinda got a queer look,but Randy (RJ338)understands me pretty well.
The object was to drive a 270 110g TTSX as fast as possible out of 26 inch barrel.
My idea was to use the STW case necked down.The round itself has been pretty easy to work with.You can see the pressure comming if you get to hot.But its still seat of the pants reloading/wildcatting without a way to measure pressure.What you think is a ok load will show itself to be to hot after a few loadings.So I ended up backing down from what I though was a good load in some cases.
All in all I havent spent this much time dicking with a rifle in a long time.But I have to admit.I enjoyed it.
Some things I learned
The TTSX was kind of disappointing in the accuracy department.I ran a range of powders and seating depths and im just not happy with the accuracy.I'd get two in a hole and one out.I'd play somemore and just could not get the consistency
that I was hopeing for.For the number rounds I fired,well over 100 TTSXs,I would say that the average of the best of the best was like a .85.Good enough to hunt with for sure but I wanted better.
Had a box of 110g GS-HV bullets.Gave them a good go and I'd say that the rifle went to .5 accuracy from the start.I also found that I could run more FPS with less wear and tear on the cases.
I ended up hunting with 110g GS-HV and 84.5g of Rel 22 with a CCI-250 primer.This combo netted me 3850fps,15 feet from the
muzzle over my old Ohler Model 33.
Flat shooting it is.Only requires 3.25 of up to be on at 400 yards from a 100 yard zero.Thats pretty flat.

The seating depth on the GS bullet was about a tolerant as you could hope for.Didnt seem to matter much where it was.Pretty much all good.Night and day difference from that to the TTSX.
M700
Rock No4 1-10 5R
McMillian HTG/GP in campfire camo.
Rifle basic Trigger
PTG Bolt,M700 knob.Sako Extractor.
NULA lock down.
Nikon Tactical X 4-16x50
Leupold QRW rings
Farrel rail.
All ready to go.
And

and

Playing around I found that the Federal 215 mag primer is very soft.You can actually distort the shape of it with a Lee Auto Prime just putting them in.I've loaded truck loads of the 205 Match primer in PPCs and never seen that.Didnt seem to have the problem with the CCI-250.I dropped them on the STW.
I played with 130g Nosler ballistic tips and the very first load went sub .6 right off the bat.Could have saved myself alot of work if I had just stuck with them.But I have to be different.
I played alittle with the 130g Hornady GMX bullet.Very sexy looking bullet.Damm fine looking.But I dropped them as about the only thing small enough you could hit, would have to be the size of a barn door......
86g of Rel 25 with a 110g TTSX makes for a one foot diameter fireball,on the end of the Rock barrel.Thought I had a flame thrower going.Dammed impressive, kinda fun and neet looking but didn't shoot that well either.
All in all.Its been a fun project.

..I've been running a 270 WCF for a number of years now with a 113g Groove EXP bullet.Its a screw machine bullet no longer in production.Made from C-110 copper.Out of a 24 inch Hart barrel I seem to remember it running 3387fps over 58.5g of Norma N204.Its been a very good rifle for me.
Comparing the two rounds is pretty interesting.

The 270 WCF on the left out of my dads 270 with a 130g BT.
The 270 STW on the right with the 110g TTSX.
The Bullets from the top down.
130g Ballistic Tip.
110g GS-HV.
110g TTSX.
Notice there pretty much all the same length.

So I had to run 26 grains more powder to gain 463 feet more a second.It just goes to show how hard it is to beat a 270 WCF.
Did I have fun?You betcha.I havent spent this much time dicking around with a new rifle in a long time.
Was it worth it?To me,it was
I capped off my deer season with this.

Thats an exit hole.Blind man could have follewed the trail.But he only went 10 yards and piled up against that tree.
He tried to slip by me at 215 yards.he didnt make it.
Poured what was left of the lungs out of him.
I'd say I capped off my 270 STW experience pretty well.
Now I'd like to turn it loose on some hogs....
You guys all have a good holiday
dave

Very cool, you get thumbs up........

Nice rifle and nice writeup!
How many rounds you reckon you will get from that tube?

Dave: Very cool post,and interesting on the bullets and cartridge.Nice buck and I may have missed it but did you take him with the 110TTSX?

Have you checked the mid-range rise at say 200-225 yards. Let me know. THX

Think I answered my own question.....

Dave what is a GS-HV and where do you get them? Are they pushed fast enough from the standard 270 to expand well down range? Say to 400-500 yards?

Nice looking rifle - what is the type and colour of the coating?

Dang, that's carrying the mail. What's it like to stand behind?

I like it.

Sambo3006,
Im thinking it will be well under 1000.But this is new ground for me.I've played with high capacity stuff before but not anything like this.I've got the load.So most of my trigger pullen will be for real.And besides.Rock Creek makes new barrels every day......
My 22 Cheetahs would drop off velocity at around the 600 round mark but they still shot.
Kinda guess it depends on what a person is willing to put up with .
Cant say enough good things about the Rock barrels.
Cant say enough good things about Wipe Out and Patch Out.
dave

Bob,
Thanks,
Thought you might like it.I tried like the dickens to make myself happy with the 270 110g TTSX.But it was just not to be.I wanted to use them.Shot well over 100 of them.GS-HV was hands down better in this gun.The thing that geeked me out was the wild stuff.Two in a hole one out,at an inch.Next group would be a .5 incher with the exact same load.The TTSX would look good and you would get excited and then try it again and get burned.I quit.I quit after what I consider alot of due diligence on my part.I know they shoot well from what I've seen around here but not in my 270 STW.
GS Customs are expensive and not that easy to get.Ill put up with it.
http://www.gsgroup.co.za/02hv.html
dave

RinB
2 inches high at 100 yards.
3 inches high at 200 yards.
1.5 inches high at 300 yards.
5 inches low at 400 yards.
Thats how I had it set up for my hunting.Distances were all lazered with Geovids.I shot a nice 2 inch 3 shot group at 300 yards just before season.
dave

JasonF,
I believe its called Duracoat Coyote Brown.
Its from these guys.
http://www.houtsenterprises.net/dur_browns.html
You can PM RJ338 and ask him for the details.
dave

SKane,
Its not that bad.Tripping the loud lever on 84.5 g of powder is going to make things happen.Theres enough movement that you have to watch your Pees and Ques.You have to have good gun handling.But it does not beat you up.I figure I could cut my group sizes down with a break.But im not a big fan of the bitch slapping you get with a muzzle break.
Feels like a 06 with a 150 bullet is guess.
dave

No need for the rangefinder with that setup.

Dave,

Awesome write up and a great looking rig. looks like you have the OAL dialed in nicely. I have a question on the primer seating. The primer in the pic is slightly protruded and is that the way it is with the STW's or is that a dummy round?

CLB

P.S. I think you have BobinNH salivating right now.

Well that was kinda the idea.
100 yards.

200 yards.

300 yards

Actually looks like it may have a bit of verticle going on,but I cant tell if its me or the rifle.
dave

CLB,
Thanks.
The round in the pick up top is a dud.Didnt notice it untill you mentioned it.

When the noodle between the ears is working right.The index finger makes better decisions.
I was thinking about Bob.Sitting in a hidie hole,waiting out a big boonie whitetail.
Just about 400 point blank yards Bob.No clicken.No dicken.Just squeeseeee.
Actually I'd like to do some more testing most likley alot more testing before I'd run it on a real hunt.
Ought to ship it off to Dober for some cold weather test.
He likes freezing his butt offf......
dave

As a kid I was always a fan of the Me109.
Now im a Fw190 kinda guy
dave

Feel free to send it my way, I'll be glad to do some deep freezem tests and will break it in a bit on pd's, yotes and chucks this spring for ya...

Dober