Hi
Would anyone have load data they are able to share for Tikka T3 in win 284 i am using 139 -140g bullets with 57 grains of ar2209 currently?
Any data pointers apperciated
Mark
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Hi
Would anyone have load data they are able to share for Tikka T3 in win 284 i am using 139 -140g bullets with 57 grains of ar2209 currently?
Any data pointers apperciated
Mark
Greetings @Boomdog,
It depends on what velocity you are getting. Current AR2209 is faster than the older stuff and there is a lot of old data still around. I suspect that your current load is max or over max. You don't state the actual projectiles you are using and this can have a big effect on pressure and velocity. Nosler lists 53 grains as max with the 140 grain.
GPM.
Yes, probably pretty warm load at 57gn 2209. I worked a bush load 54 - 55gn 2209 pushing 140gn Accubonds
Phewwww, that’s pretty warm in most actions. I’m shooting 50.5 of 2209, 160 tmk@2700fps
I am using hornday 139g interlocks with 57g AR2209 no pressure signs out of a 16 inch barrelQuote:
Originally Posted by grandpamac
Running 53gr of 2209 with 162 ELD-M at 2705fps, 18" barrel.
Some data I have for my Tikka 7mm-08 which was reamed out to .284 Win
Lapua 6.5/284 cases necked up to .284
Federal large rifle primer
53 gr AR2209
Sierra 150 gr projectile
I later changed loads
Same cases
Federal large rifle primer
54 gr RE17
140 gr ballistic tip
Please also note that these loads are for my rifle and any load data you get from people should always be treated with caution where you still need to take due diligence and work up a load for your rifle.
Interesting changing to re17, What speeds were you getting out of curiosity? CheersQuote:
Originally Posted by Seventenths
Greetings again @Boomdog,Quote:
Originally Posted by Boomdog
You are unlikely to see any of the commonly quoted pressure signs until you are well over max pressures. Hodgdon does list 57 grains of H4350 (AR2209) with the 139 grain SST for 3,079 fps. This projectile is reasonably close to the Interlock you are using. It is loaded to 74mm (2.915") overall length and as the pressures are in the now obsolete CUP my concern would be that this data is for the older and slower AR2209. Hodgdon quotes a velocity of 3,079 fps in a 24" barrel but yours is 8" shorter so you would lose between 200 and 250 fps or 2,800 to 2,850 fps in your barrel. For your and your rifles safety your load needs to be chronographed. A combination of a shorter throat and faster powder could have put you well over the limit. Please feel free to ask questions.
Regards Grandpamac.
Greetings once again.
I had a fish around in the Hornady data for the .280 AI. This has a slightly larger case (around 6% larger) than the .284 and operates at the same or slightly higher pressure. Hodgdon lists 55.5 grains max of H4350 (AR2209) with the 140 grain Nosler Ballistic tip for 3,013 fps. The Nosler projectile is similar to the projectile you are using. It seems obvious to me that the .284 data is for the older and slower AR2209 and you should regard 55 grains of AR2209 as max for the 139 grain Interlock, much in line with the other posts.
Regards Grandpamac.
Not sure of speeds but accuracy is a clover leaf, RE17 or Superformance will give you better velocity than AR2209Quote:
Originally Posted by Fly-My-Pretties
I run 55.5g of 2209 behind 150 nbt for 2800 fps with no pressure signs at all. This is in a long action with projectile seated just above shoulder.
Please see link to ADI load data it lists 57 grains as max load for AR2209 with 139g bullet
Data – Rifle – ADI World Class Powders and Ammunition
Also what changed with AR2209 from old to new?
See post below I am following ADI manual which for bullet weight lists 57grains as max loadQuote:
Originally Posted by grandpamac
Greetings @Boomdog,Quote:
Originally Posted by Boomdog
A little after 2,000 AR2209 became a faster powder. There is some difference between lots or production batches but this change was more than that. I was working with the 129 grain SST in my 6.5x55 and bought a new container of AR2209 about 2,019. The first tests showed much higher velocities with the new powder than I was expecting so I went back and ran some paired trials using the ADI/ Hodgdons max of 45.5 grains with the following results.
45.5 grains AR2209 packed 2,001 2,720 fps. This is in line with the current ADI/ Hodgdons data of 2,703 fps at 45,500 CUP
45.5 grains AR2209 packed 2,019 2,805 fps.
I also went back to my old chronograph records and found that the older powder was still giving the same velocity back to when it was new. A search on the web found mention in this increase in speed for AR2209/ H4350 around 2,002 so the change in speed is real. With this increase in speed comes an increase in pressure which calculates to around 49,300 CUP, still within the 52,000 CUP which is a common max for new rifles and cartridges. 46 grains of AR2209 produced 2,855 fps with a calculated pressure of 51,200 cup but I have gone with 45.5 grains. I also ran some tests with the 120 grain with the same general results.
Looking at the Hodgdons/ ADI data it is clear to me that the 57 grain load is clearly an outlier and should not be used. Cross checking with data for the .280 Rem AI, which has a larger case shows this quite clearly and I am always suspicious of data with pressure in CUP.
All this likely sounds confusing to someone who I suspect may be at an early stage of a handloading career but using the most recent data available for the components you are using is essential to keeping out of trouble. To me working up a load with a chronograph is an essential to keeping out of trouble. Relying on "pressure signs" whatever they are will not. I see that you are in Christchurch so you may wish to go along to the Handloaders club at McLean's Island. They will have all the Kit and a mountain of knowledge to go with it.
Regards Grandpamac.
Thank you grandpamac, as it turns have been hand loading for last 20 years, have also been a member of NZHA in the past have access to a private range so ceased to be a member. I am new to the 284 cartridge and have seen various post and load information for this cartridge (some as high as 58 grains) I seat the bullet out magazine length in the tikka with a small jump to the lands. The load I am using i worked up from 52 grains and have chronograph these as part of load development.
Based on your posts though I will probably back the load off to 56.5 grains as I agree better to safe
Thanks again
This was my exact load for 20 years using 139gr Interlocs. It was in a BSA Medium action and loaded to approx 3in. It was the Nick Harvey recommended load back in the day. I am now using 56gr RE16 with 140BTs as one of my loads but in Tikka action.Quote:
Originally Posted by Boomdog
55.5gr 2209
162gr ELD-M
Tikka T3
18" Barrel
2716 FPS
This about 0.5gr less than the hard limit for this rifle.
The throat is longer than a std 284 so the projectile is seated with the BT right on the neck junction. COAL is longer than normal.