Yes I would think so with 129gnr's. Excellent shooting.
Printable View
Yes I would think so with 129gnr's. Excellent shooting.
Fireforming. Mixed success I guess. Worked up to 15gn AP70N plugged with cleaning cloth...which has to pushed all the way in not just tucked in the neck (in case anyone is silly like me). Not sharp shoulders but all set for full 260AI load.
10 grains:
http://images.tapatalk-cdn.com/16/01...069354c132.jpg
15gn FF, 260, 260AI case:
http://images.tapatalk-cdn.com/16/01...d46a6a7db6.jpg
Sent from my SM-G925I using Tapatalk
I used 17grs of AS-30 nice sharp shoulders.
What powder have you found the best so far?
I could've gone higher may be but was worried I'd stuff the primer pocket... @7mmsaum should I go hotter?
I am only using RE17, and have a tub of AP-70.
Would love some more RE17 if any one has some.
@25/08IMP AP-30 is their fastest powder so 17gn means I have room to move I suspect.
Abe tried 14 up to 18 grns when he did my barrel 18 had a slight ejector mark but 17 was fine and a 2" square patch pushed hard over powder.
Sent from my SM-G900I using Tapatalk
I use heaps more AS 30N than that.😆
Sent from my SM-G900F using Tapatalk
Went to 19gn and no real improvement...very hot suppressor.
I take it off and point it into a big bag of rags.
Sent from my SM-G900I using Tapatalk
Hahaha
Yeah I didn't use the cloth with the suppressor...was loading and firing out of gunroom window as I went...upside of rural living... the 0.25" squares were gone before the end of the barrel but decided against chance.
A 'load' of drama - fire forming [emoji41][emoji41]
Yes that fire forming load can go hotter to sharpen up those shoulders, and lube the outside of the neck and shoulder with Redding sizing wax, this helps the shoulder form even easier without chamber wall friction.
@Tikka7mm08 what's the latest on this front? Tried any of those 143gr ELD-X in this machine yet?
Hi...sorry bit behind. Haven't seen the 143gners yet...got 2 boxes on order still.
Yeah I bet that bloody scope saga has really eaten into your enthusiasm :pissed off:
I've got about 90 loaded up for fire forming and sighting but due to my local range out of action very little else has happened on my 260Imp. Got a Magneto Speed on the way too, will get serious when this arrives.
Why all the hassle with fireforming??????
When I ackley improved my .257 Roberts I just fired standard .257 ammo and bobs your uncle! Fireformed brass.
Yeah mate spot on re the scope...!! Put a vx6 3-18 on it now. Got a few kilos of RE17 so that part sorted.
Re fireforming...I am probably going to get some cheap projectiles and fireform that way...
Good thinking....will do that too!
Yeah i'll prob go shoot some goats when i fireform my .260Ackley
http://uploads.tapatalk-cdn.com/2016...34a1da672d.jpg
45gn RE17 143gnEld-x
http://uploads.tapatalk-cdn.com/2016...6f5e7170a0.jpg
45.3gn RE17 143gnELD
http://uploads.tapatalk-cdn.com/2016...7407c3b02f.jpg
45gn RE17 140gnVLD hunting
Can anyone measure the groups for me and run these thru quickload?
Sent from my SM-G925I using Tapatalk
You gotta be happy with either of those :thumbsup: Did you run them over the Magnetospeed?
Yes 45.5gn is 3007fps...think speeds are earlier in this thread. Had a primer pop but on 4th reload. So hard to judge pressure with AI cases.
Load so they only require a neck size until the 4-5th go and you will be right. If ya have to bump the shoulder or body size after firing one formed load you are getting up there.
3000 with a 140 is up there in the .260 AI depending on barrel length.
Shoots nice and its good to see groups posted on target for once😆
Sent from my SM-G935F using Tapatalk
Thanks @R93 - so will necksize this latest brass and see if it the bolt closes nicely. If not sign there is too much pressure, ie headcase expansion?
I would measure the case head with a mic. Anything over .0005 over from a new case I would keep an eye on.
In saying that I could get away with 46grns of RL17 in my rifle.
I stopped using it because it was a prick to get when you needed it.
Do you have a body die?
Sent from my SM-G935F using Tapatalk
Ok. I just went through all brass. TBH I hadn't kept them in batches for refiring - lesson learnt. 11 tight bolt after neck sizing, 16 AOK. I then FL sized the tight ones but it made no difference, still tight bolt, so they are in the bin.
I don't have body die? I have kilos of RE17.
I might drop back to 44gn and see how I go...? Or when firing a fireformed case with 260AI for first time check case head with mic...? I measured a new Lapua case and it is 11.91mm - the NS case are all 11.91mm and 11.92 with 1 case at 11.94mm. My Mitutoyo only goes 2 DP in metric and 3 DP in imperial...do I need something much flasher to measure 0.0005 (mm?)??
Check that those tight cases don't have ejector marks on the base by primer, these will be proud and make your brass longer to the shoulder and may cause a tight fit. If so then that's a sign of over pressure.
No sorry to confuse.
I am a dinosaur and still use imperial when it comes to reloading.😆
Also case head expansion is the best way to indicate max pressure in an Ackley Imo.
You don't want to see much case head expansion at all. .0127 mm is .0005 inches.
Best done with a blade mic or an accurate vernier but I use a normal mic and mark my case for a 12 o'clock and measure the same place each time.
.260 Ackley will be around max pressure at around .0005 inches or .0127mm in my experience.
A body die would likely have given you a few more goes out of the brass you binned until it wouldnt hold a primer.
Drop the load back as you said and see how you go.
I get 2930ish with 140 class projectiles but have not tried the bergers.
I get around 8 goes out of a case before I have to bin so I am still on the slightly hot side for my barrel.
Sent from my SM-G935F using Tapatalk
OK gotch...thanks @R93 :)
Just bought a body die...hadn't needed one before.
Sent from my SM-G925I using Tapatalk
So the body die didn't seem to bring the tight brass back in the spec. I set it so it was firm bump of shell holder and die. I got Quickload and it suggests my 45gn RE17 is too hot...which is what my brass is telling me. I am looking at getting a Whidden hydraulic die too just to avoid fireforming brass, as I find that a waste of time and money (I only want to shoot FF loads now).
My body die will still bring them to chamber after 8 or so firings but they won't hold a primer well enough.
Sent from my SM-G935F using Tapatalk
I had to shave 20 thou off my shell holder to get my body die to work for my 7mm08AI.