Spike Camp

6.5-300 Load Help

6.5-300 Load Help
« on: June 21, 2018, 07:33:49 PM »
I've searched around trying to find information regarding the strange findings I'm having while working up a load for my Vanguard First Lite.

Load workup as follows:

127 LRX
CCI 250
COAL 3.60
US 869

I've worked up from 90.5 to 94 grains. Best group I've found so far is 1.25 inches with most being closer to 2 inches at 100 yards.

The strange thing I'm seeing and what I would like some more experienced loaders to help me with is that I'm seeing no velocity increase when going from 92.5 to 94 grains.

4 3 shot groups of 92.5, 93, 93.5,94 grains respectively. First shot at 92.5 grains was 3430 fps. the group averaged 3420. Each group after that averaged 3430. Still not showing much signs of pressure at 94.. no ejector marks, primers not flattened, bolt lift still normal.

Also, doesnt this velocity seem a little lower that what I should expect? The gun has full 26 inch barrel.

I load and shoot to a mile with my 300 win mag with 190 Bergers no problem. 1600 with my 6.5 Creedmoor. My 257 load is 110 Accubond at 3450 sub half MOA. I'm at a loss.

Any advice?
« Last Edit: June 22, 2018, 04:05:45 AM by edgecrum »

Re: 6.5-300 Load Help
« Reply #1 on: June 22, 2018, 05:04:07 AM »
I would try another weight bullet and see if the rifle prefers something else.  Welcome to the nation.   :)

Re: 6.5-300 Load Help
« Reply #2 on: June 22, 2018, 11:59:33 AM »
Welcome, my load is 140g accubond with 91g US869, F 215 primer 3400fps. Your load with 94 g should be going around 3550 fps, my rifle don't like the 127 lrx and I have more confidence in cup and core bullets. I would try a accubond or ballistic tip or try seating your 127 g deeper. I believe factory length is 3.50
John

Re: 6.5-300 Load Help
« Reply #3 on: June 22, 2018, 12:25:23 PM »
I have 143 ELD-X on hand. I was considering loading some of those. I have the US869, Retumbo and H1000 on hand. I also have a box of the factory LRX on the way. I'm not interested in running 100 shots through this thing to find a load if I can help it with the barrel life being what it is.

Re: 6.5-300 Load Help
« Reply #4 on: June 25, 2018, 05:21:27 PM »
So 91 grains US 869 and the 143 ELD-X yielded a half MOA group at 100 yards. I'm puzzled by the velocity though. The group averaged 3280 fps.

Re: 6.5-300 Load Help
« Reply #5 on: June 26, 2018, 07:20:40 AM »
I think that your chrony is off, maybe you can borrow another to try. I think you would be around 3350 fps unless you have a slow barrel or maybe I have a fast one. But a 1/2 in group with that high BC bullet is an excellant load.
John

Re: 6.5-300 Load Help
« Reply #6 on: June 26, 2018, 07:37:33 AM »
Ok so here is today's plans. I have a box of Weatherby 127 LRX on hand. I also am loading some of the 91g ELDX loads. I have my magnetospeed and my optical chronograph. I will see if the numbers add up.

Of note :  My barrel after around 30 shots was heavily copper fouled. So I just finished pulling the copper and it's surgical clean right now.

We shall see.

Also : Does anyone have first hand experience with the performance on white tail sized game with the ELDX at these velocities?
« Last Edit: June 26, 2018, 07:39:23 AM by edgecrum »

Re: 6.5-300 Load Help
« Reply #7 on: June 26, 2018, 07:58:04 AM »
You my have to shoot a few shots with a clean barrel to regain accuracy, I also used a Magneto speed. The 127 factory went 3540 fps from my MarkV, no experience with the ELDX but they should kill a deer like a stroke of lightning.
John

Re: 6.5-300 Load Help
« Reply #8 on: June 26, 2018, 08:28:43 AM »
4 shots factory LRX.  1 fouler then 3 for group. Grouped just under 1 inch. Velocity checked with both chronos. No errors. 3384-3377,3350-3356,3349-3351,3397-3394. Spoke to CS rep at Weatherby and he's sending me a complimentary box of the 127 in case the box I bought was a bad batch. The mystery continues.
« Last Edit: June 26, 2018, 11:15:23 AM by edgecrum »

Re: 6.5-300 Load Help
« Reply #9 on: July 02, 2018, 04:52:52 AM »
So I finally decided to give the ELDX velocity chase another try. My hottest load until this point was 91 Grains of US869 which yielded and average MV of 3280. I loaded up 3 loads each of 92 and 93 grains. I didn't chronograph the 92 grain load but I did the 93 grain load. The 93 grain load was definitely on the hot end of things. Bolt lift a little tough and some pressure signs on the base. However they went over the chronograph at 3425 with a 1 inch group that I feel was actually better but my shooting hurt the group slightly. I can work with 1 inch groups since my longest shot on game is around 450.

I'm tempted to just run with that load even though it is definitely hot considering how few shots the gun will get and the temp during these tests was 95. I feel that during hunting conditions a *slight* pressure drop may take place.

Thoughts?

Blackbear3

  • *****
  • 1949
  • In God We Trust!!!
    • View Profile
Re: 6.5-300 Load Help
« Reply #10 on: July 03, 2018, 03:42:05 PM »
Personally I would back off a 1/2 grain and see how the velocity and groups are at 92 1/2?
We stand for the Flag, and we kneel for the fallen!!!

Doug-NRA Life Member

.257

  • *****
  • 963
    • View Profile
Re: 6.5-300 Load Help
« Reply #11 on: July 03, 2018, 05:03:49 PM »
Your longest shot is 450, at a whitetail.
IMO l would go with the load that produces 1/2" groups with no pressure.
Your other load has  obvious pressure signs and is going 145 fps faster. You will gain every little in  trajectory and you have more than enough gun for deer hunting so the added energy really isn't needed
Stay with the load that is giving great  accuracy and is trouble free
Once again just my opinion
Mike

Re: 6.5-300 Load Help
« Reply #12 on: July 03, 2018, 06:06:00 PM »
I would back off 1g and try it, 1/2 grain won't make much difference when you are burning 90+ grains of powder.
John

Re: 6.5-300 Load Help
« Reply #13 on: July 11, 2018, 08:59:13 AM »
Ok so here is today's plans. I have a box of Weatherby 127 LRX on hand. I also am loading some of the 91g ELDX loads. I have my magnetospeed and my optical chronograph. I will see if the numbers add up.

Of note :  My barrel after around 30 shots was heavily copper fouled. So I just finished pulling the copper and it's surgical clean right now.

We shall see.

Also : Does anyone have first hand experience with the performance on white tail sized game with the ELDX at these velocities?

I have had stellar accuracy and terminal performance running the ELDX's at 3400+.
« Last Edit: July 11, 2018, 09:05:20 AM by cacsrx1 »

Re: 6.5-300 Load Help
« Reply #14 on: July 12, 2018, 03:10:18 PM »
Spoke to a very knowledgeable guy at Weatherby today. Unfortunately a while back they weren't meeting accuracy requirements at an acceptable level so they changed from a 5 groove to a 4 groove barrell setup. Fixed their accuracy problems but hurt velocity in the neighborhood of around 100 fps. So apparently I basically have a 26 Nosler.