cart SHOPPING CART You have 0 items
SELECT CURRENCY

Discussion Forums

Search forums

ADI powders

02 Jul 2017
@ 07:57 pm (GMT)

Jason Yozzi

Hi all

Bit of s brief over run so you all get the reasoning for my posts and questions. I guess mi curios to see if anybody has come across the same issue and or what there findings are, Nate if your reading it would be really great to hear from you.

First let me say I have all of Nates books and there is only one word to describe them they are awesome and that's for all the hard work that's went into them.

I shoot a 300rum went through all of the things as nates books say to do, I've put s lot of time in too my sendero rifle and developed a load with the 208amax and have it shooting .3 groups with a ES of 22fps and velocity of 3112 fps. Sounds great right what else could you ask for, possibly not as fast as I could push it but very accurate and all es is good I'm a happy man all the hard work paid off right!!

So I do all my brass preparation makes sure everything is to the thou and load 50 rounds up, take those round out for a shot got my steel out at 685 yards, dope my sightron first shot smack on the money second shot smack on the money. Then I couldn't hit the side of a barn. Ended up shooting all 50 over time on different days with the same result.
I'm loading with ADI2225(retumbo ) and have read on other blogs where guys taking out there rifles with a known load have had the same issues.

Has anyone had similar experience with retumbo/2225 Im keen to hear, I have also used RE25 with good results but couldn't get the velocity.
My load for my Remington 300rum is 93.2gn 2225 208amax Remington 91/2 mag primer.

Replies

02 Jul 2017
@ 08:30 pm (GMT)

Chris Murphy

Re: ADI powders
My 7mm rem mag did the same thing after about 1300 rounds after two shots it would start spraying them. Let cool and back on target so it got a new barrel. How many rounds has your barrel seen
02 Jul 2017
@ 08:37 pm (GMT)

Jason Yozzi

Re: ADI powders
Hi Chris

I've shoot about 250 round through the rum,
Always let the barrel cool and never shoot long strings.
I have read that on some of the American blogs that guys were having all sorts of issues with retumbo/2225 one guy having to reduce his load
As much as 8 grains with new batch of retumbo. Then there's guys who
Sware by it and say they had the same issues with 2217.
Cheers
Jay
03 Jul 2017
@ 03:47 am (GMT)

Greg Quick

Re: ADI powders
Hey Jason. I'm American that has a few American redneck buddies who think the same thing about retumbo. But I think one of them started to claim he had fliers with retumbo and it had a domino effect with others. He was using it in his 338 edge and said he'd get 3 in the hole and 1 flyer. He switched to H1000 and then to reloader 33. I never gave into the rhetoric and continue shooting retumbo out of my 338 Norma wildcat and have had no issues with fliers. As you can see on the blogs you've read, opinions are all over the place. I stop reading them long ago because there's is so much bull shit out there. I've even stopped listening to a lot of people I know because there's just as much bull shit here too. I don't have the knowledge to help you but I know exactly what you're talking about when it comes to this issues since I've heard and seen the same exact rhetoric around here. My personal opinion would be to try to find other possible problems to eliminate or simply buy a small 1 pound container of different powder and see if you're having the same problems.
03 Jul 2017
@ 09:35 am (GMT)

Nathan Foster

Re: ADI powders
Hi Jason, when I was young, I had folk (salesmen) tell me that ADI was just a cheap powder made in Oz, conjuring images of an Australian in a hut somewhere in the outback, making powder while trying to split the beer atom. Fortunately I was able to get past all of this and see the faults in my own processes. ADI make good powder, its as simple as that. So lets put that to rest.

Trying to diagnose this via the net is hopeless. I will try to offer some ideas but without having the rifle in hand, you can treat my comments as being as helpful as any other 'bullshit' you have been fed. Regardless, here we go:

To begin with, you must go back to 100 yards and report on groups.

If groups are poor at 100 yards then we might consider the following (assuming all steps in the books were followed):

Sand has blown into the muzzle after shooting on a windy dusty day (personally been through this once). Remedy- rebarrel.

Slow burn caused a secondary pressure wave at 3/4 barrel mark which has by fluke, created a minute bulge towards end of barrel. I have seen this also once or twice but could not put it into words until I saw external pressure test research from other sources after which the penny dropped. If this is occurs, it is reflective of the burn rate, but to this I would add bore dimensions and bore finish as relevant factors following my own research. There is more to this than the actual brand of powder. It is foremost an issue concerning a large but slow powder charge versus a small and long oriface. If the muzzle has a thin thread on it for a brake, this could also have swollen. If the barrel has bulged and there are no obvious signs of where it has bulged, it may have to be thrown away.

A basic change in the sweet spot node with throat wear (becomes apparent at 250 rounds in the RUM). Remedy- Polish throat and possibly increase charge by .5gr when retesting.

Scope or mounts loosened under ongoing recoil.

Please note that in some instances, when groups have suddenly opened up on me over the years via some internal bore change including wear, I have at times overcome accuracy issues by changing bullet weights, utilizing the longest pill I can find. The long bearing surface and drop in velocity can at times overcome internal bore issues. You may want to try the 225gr ELD-M before giving up on this barrel.

So there you go, thats some expert bullshit for you. Hope it helps.
03 Jul 2017
@ 11:12 am (GMT)

Nathan Foster

Re: ADI powders
FYI, my post was in agreement with Greg. He was and is quite correct.
04 Jul 2017
@ 02:17 am (GMT)

Jason Yozzi

Re: ADI powders
Hi all

Thanks for all the replys always good to hear about others thoughts and finds on a reputable site like this.
Nate you kill me and have me in fits of laughter with you replys sometimes
And I will only listen to expert bullshit.

Nate all of the things you have spoken about I follow you books on so barrle gets a scotch bright ever 100 rounds.

I gues my posts was just so see if anyone here had the same findings as written about in the posts I read.
I know here in Western Australia these not to many people using retumbo/2225.
I guess I'm going to load up another 20 and see if I get the same results.
I'll be sure to let you know how it ends up.
04 Jul 2017
@ 02:44 am (GMT)

Jason Yozzi

Re: ADI powders
Nate
Or others wile on the subject of my 300rum, I've never be able to get the 180 grain SST to shoot in my rifle I've tried all kinds of powder load nand combinations but could never get it to shoot in my gun.
Has anyone ever found they could just not get a particular Bullet to shoot in there gun. Nate with all you experience have you ever found a particular bullet in a particular gun just wouldn't shoot.

Cheers
Jay
04 Jul 2017
@ 09:22 am (GMT)

Nathan Foster

Re: ADI powders
OK, it is possible that your polishing has been a bit too severe depending on how tight the poly patch was. At the 100 round mark, use a rag and paste. I would only introduce the poly pad if it looks like accuracy has waned a bit or if usage has been harsh (barrel hot, heavy strings though to 200 rounds). If you wish to use a poly pad more regularly, use the grey grade as this will be the kindest. Its a bit of a catch 22 as I have written in the books as doing nothing is the worst, especially in the RUM But too much abrasion is not the best either. We each have to find our own way in this. Your regime may possibly have been harsh but it will at least have ensured the pores in the steel have remained closed.

In any case, it may just be that you need to rework loads and from your description, you may end up increasing by a couple of grains to regain the same velocity / accuracy node you had before. 100 yard testing and chrony readings will be needed before you can go any further.

The Remington's quite often struggle with the SST due to the throat leade angle Remington use. Its just the way it is. In a non space walk magnum like the 7mm RM or .300 WM, you can at times load the SST to touch the lands provided the loaded ammo can be extracted from the chamber if need be without the bullet sticking and spilling powder through the chamber. You will find that some Sendero, SPS and LRH rifles respond to this. Yours is simply too long in the throat for this.
 

ABOUT US

We are a small, family run business, based out of Taranaki, New Zealand, who specialize in cartridge research and testing, and rifle accurizing.

store