I have some Hornady 6.5 mm, .260 129 Gr SST and some AR2206H  at hand.

Can anybody suggest a load please. Somewhere to start at least and not hot.

Think you'd be better getting some 2209 for that case/prog weight combo.  2206H is a tad fast for it

Yep, RE19, AR2213sc or H414 will work much better.
50 grains of AR2213sc fills the case, gives good velocity, and is a mild load in mine - but may not be in yours.

Nor-West wrote on Apr 6^th, 2018 at 12:13am:


Might have been looking at that very detailed thread from back in bout 2006-7 yesterday after doing a search. Will see if I can find it again. The were several graphs etc in it. Lots of old names and exmembers taking part in an indepth discussion on the .260 and different powders.

Yes it is for that gun. I was reloading already for it but not for a year or more and cant seem to find the notes I made at the time. It was likely 2208 as Ive only recently starting buying 2206H for anohter project. 

44gr 2209 behind 120gr prohunter. dont have any fancy data or statistics but groups inside an inch at a hundee, funnily enough i went through all threads i could find and 44gr was about what others were using and mid way between book recommendations, i didnt work up a ladder and faff around much, just loaded a few and tried it out, it shot really well, shooting out to 400yards, matches up with my vortex ballistic scope hash marks too

Gidday Headcase - is that Norwests old 260 rifle ??  In which case I just bought a sister-ship and will reload for it after I run through the 70 rounds of factory that came with it.

I fired up Quickload to run some comparisons for the powders mentioned with a 20" barrel and the Hor 129 SST:

First AR2209:

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt
%       %    Grains   fps   ft.lbs    psi    psi      %       %

- 
-08.0   97    41.40   2541    1849   44972  11318     91.5   
-06.0   99    42.30   2601    1938   48113  11621     92.7   
-04.0  102    43.20   2662    2030   51497  11911     93.8   
-02.0  104    44.10   2724    2125   55145  12187     94.8   
+00.0  106    45.00   2786    2223   59088  12445     95.7 

So with AR2209 you're probably going to run out of case capacity before you get too hot - at least in a Rem Model 7 with its finite mag length.

Now AR 2206H:
Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt
%       %    Grains   fps   ft.lbs    psi    psi      %       %


-10.0   76    32.40   2363    1600   38645   9734     96.9   
-08.0   77    33.12   2410    1664   40803   9948     97.5   
-06.0   79    33.84   2457    1729   43067  10153     98.1   
-04.0   81    34.56   2503    1795   45442  10347     98.6   
-02.0   83    35.28   2549    1862   47935  10531     99.0   
+00.0   84    36.00   2595    1929   50551  10703     99.3   
+02.0   86    36.72   2641    1997   53297  10863     99.6   
+04.0   88    37.44   2686    2066   56179  11012     99.8   
+06.0   89    38.16   2730    2135   59206  11147     99.9   

So with 2206H you can still get a useful velocity, all powder you're putting in the case is burnt, and ikts posible it might shoot well in the rifle.

The starting loads shown here are within those specified in the ADI manual.

Cheers

Here Tis'

AR2208

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt
%       %    Grains   fps   ft.lbs    psi    psi      %       %

-10.0   82    34.20   2401    1651   40976   9778     96.9   
-08.0   84    34.96   2449    1718   43343   9994     97.5   
-06.0   86    35.72   2497    1785   45838  10200     98.1   
-04.0   88    36.48   2544    1854   48466  10395     98.6   
-02.0   90    37.24   2592    1924   51237  10579     99.0   
+00.0   92    38.00   2639    1995   54157  10751     99.3   
+02.0   93    38.76   2686    2066   57237  10911     99.6   
+04.0   95    39.52   2732    2139   60486  11057     99.8   

The last load on this table is potentially "hot" so work up carefully.

Cheers

Its a T3 with a trueflight barrel. Feels good to shoot.   

Jeff built it and sold it for a very fair price. Hes going staight to heaven.