QUICK LOAD HELP

[xbonesny]

If anyone has quick load, and the time, could somebody run a scenario for me? I am using a new powder RL-26 in my 6.5 creed. I have a 26" 1:7.5 twist barrel. I am running the 147 grain ELD-M's. I am curious as to where I might see pressure. My base to ogive is 2.193 and my COAL is 2.83. I am using ALPHA Brass which is .015 thick at the neck. It is heavier than Harnady but similar to Lapua. My H2O capacity is 50.1 GR filled to the top. I hope I've provided the necessary info. I am considering quick load but I'm running a MAC and not a PC so I will eventually have to do all the computer conversions to run windows

 

[Hawk in WY]

Max appears to be around 46.6 grains for 2,924 fps at 70 degrees but you will have a hard time getting that much powder in the case.

Optimal barrel time is around 44.8 grains for 2,804 fps.

I would start lower and work up to 44.8 and a bit above watching for pressure signs.

Start low in the range of published data and work up to these levels watching for pressure signs. Do not start with these loads. Powder has a 10% variation in burn rate and we don't know the burn rate of your particular lot of RL 26.

Let me know the velocity you reach with different loads and I will adjust the burn rate.

Let us know how it turns out. I'm always looking for independent verification of QuickLOAD OBT loads.

Good luck.

Note to QuickLOAD users. I created a new file for the 147 grain projectile from the 140 grain ELD M changing bullet weight, BC and projectile length. Anything else I need to change?

Note to OP: While you're trying things, try 39.5 gr H4350. Velocity estimate only 2,660, but should be more accurate according to QuickLOAD.

 

[xbonesny]

my lot number for rl-26 is 11916z041418

 

[xbonesny]

I'm heading to range tomorrow and am starting at 44 and heading to 44.9 in .3 grain increments

 

[xbonesny]

Max appears to be around 46.6 grains for 2,924 fps at 70 degrees but you will have a hard time getting that much powder in the case.

Optimal barrel time is around 44.8 grains for 2,804 fps.

I would start lower and work up to 44.8 and a bit above watching for pressure signs.

Start low in the range of published data and work up to these levels watching for pressure signs. Do not start with these loads. Powder has a 10% variation in burn rate and we don't know the burn rate of your particular lot of RL 26.

Let me know the velocity you reach with different loads and I will adjust the burn rate.

Let us know how it turns out. I'm always looking for independent verification of QuickLOAD OBT loads.

Good luck.

Note to QuickLOAD users. I created a new file for the 147 grain projectile from the 140 grain ELD M changing bullet weight, BC and projectile length. Anything else I need to change?

Note to OP: While you're trying things, try 39.5 gr H4350. Velocity estimate only 2,660, but should be more accurate according to QuickLOAD.

I am also using Fed 210M primers if that is helpful in quick load input.
Thanks again for your input and I hope to provide great results tomorrow

 

[Hawk in WY]

my lot number for rl-26 is 11916z041418

Lot number is not what I need. With velocity for a given load, I can back estimate the burn rate. Ambient temperature is also helpful.

 

[xbonesny]

Lot number is not what I need. With velocity for a given load, I can back estimate the burn rate. Ambient temperature is also helpful.

OK...got it....will let you know later this morning

 

[xbonesny]

I got slight pressure at 44.9 but group was .22" at 100 and SD was 12. Avg 2791. I am going back out and trying 44.7 with a bit more jump. Temp was 65@ 70 feet above sea level. I will post results later along with target pic

 

[Hawk in WY]

Outstanding!

I would be tempted to call that good.

I adjusted for temperature and the burn rate of your lot of powder which is slightly slower than QuickLOAD tested. The new OBT is 45.1 grains Reloder 26. I would test .2 grain increments 44.7 to 45.1. You can fool with COAL if you want but .22 meets my standards. Now take it to 1,000.

Suprised you are seeing pressure signs. PMax is 63,091. QuickLOAD is estimating pressure as 53,554. Even at 85 degrees pressure is estimated as 56,052.

Love it when a plan comes together.

Your brass volume of 50.1 is surprising low compared with QuickLOAD's assumption of 53.5. You are supposed to measure fired, unresized cases.

QuickLOAD users Alert: The 147 ELD M is not in the database. I adjusted the 140 ELD M for projectile weight, length, and BC. Anything else I need to adjust?

 

[xbonesny]

here are my actual FPS Numbers with 44.9 Grains 1)2807 2)2784 3)2773 4)2795 5)2786 This was seated at 25 thou off lands and saw slight pressure with a slight heavy bolt lift but group was .22 at 100 bottom pic and one flyer that was all me
44.7Grains 1)2783 2)2762 3)2767 4)2769 5)2753 This was seated at 45 thou off the lands no pressure and group was .25 at 100 with no flyer first pic.
My barrel has a 1:7.5 twist so maybe thats why I saw slight pressure with less jump? M
The brass I measured for volume were resized to 1.91 and fired, so thats on me

 

[Hawk in WY]

You need to measure fired but unresized brass. This is to measure your chamber. Send me those data and I will rerun the OBT load.

When you changed COAL on the second load, you are changing pressure and velocity/ barrel time. You changed load and COAL. Easier if you only change one variable at a time.

To those wondering why anyone pays $150 or whatever it is now for QuickLOAD, here is an example where, combined with Chris Long's OBT data, we found an outstanding load without firing a shot.

I'm convinced.

 

[xbonesny]

Outstanding!

I would be tempted to call that good.

I adjusted for temperature and the burn rate of your lot of powder which is slightly slower than QuickLOAD tested. The new OBT is 45.1 grains Reloder 26. I would test .2 grain increments 44.7 to 45.1. You can fool with COAL if you want but .22 meets my standards. Now take it to 1,000.

Suprised you are seeing pressure signs. PMax is 63,091. QuickLOAD is estimating pressure as 53,554. Even at 85 degrees pressure is estimated as 56,052.

Love it when a plan comes together.

Your brass volume of 50.1 is surprising low compared with QuickLOAD's assumption of 53.5. You are supposed to measure fired, unresized cases.

QuickLOAD users Alert: The 147 ELD M is not in the database. I adjusted the 140 ELD M for projectile weight, length, and BC. Anything else I need to adjust?

Also, I am using alpha munitions brass which is heavy and thicker than hornady...I just remeasured volume and its 51.1 grains to the top. I took the brass from today

 

[xbonesny]

You need to measure fired but unresized brass. This is to measure your chamber. Send me those data and I will rerun the OBT load.

When you changed COAL on the second load, you are changing pressure and velocity/ barrel time. You changed load and COAL. Easier if you only change one variable at a time.

To those wondering why anyone pays $150 or whatever it is now for QuickLOAD, here is an example where, combined with Chris Long's OBT data, we found an outstanding load without firing a shot.

I'm convinced.

Got it...I was bit pressed for time, but will make adjustments to one at a time...maybe 44.9 again with the shorter OAL

 

[Hawk in WY]

Also, I am using alpha munitions brass which is heavy and thicker than hornady...I just remeasured volume and its 51.1 grains to the top. I took the brass from today

The larger case capacity moves the OBT load for a 26 inch barrel to 45.3 grains with COAL of 2.83.

If you seat further off the lands (reduce the COAL) pressure/velocity goes up and the OBT load goes down.

You may want to run a last 44.7 to 45.3 test and then take it out to 1,000.

Five shot groups count. Ten are better.

 

[Hawk in WY]

At COAL of 2.81 the OBT load should be 45.1 grains.

You might want to test COAL at the same powder charge, but frankly at .22 why bother?

Good shooting.

 

[xbonesny]

The larger case capacity moves the OBT load for a 26 inch barrel to 45.3 grains with COAL of 2.83.

If you seat further off the lands (reduce the COAL) pressure/velocity goes up and the OBT load goes down.

You may want to run a last 44.7 to 45.3 test and then take it out to 1,000.

Five shot groups count. Ten are better.

Even with a faster twist barrel? I'm told I will see pressure sooner with a faster twist

 

[Hawk in WY]

Not so sure about that.

http://bulletin.accurateshooter.com/2015/02/does-barrel-twist-rate-affect-muzzle-velocity-litz-test/

They measured velocity, but velocity correlates to pressure.

 

[xbonesny]

I'll be at it again tomorrow. BTW....I took an H4350 load of 40.5 grains pushing 2720 to 1760. 9 out of 15 hits on a 24"x24" plate with two on a 10" plate

 

[xbonesny]

Not so sure about that.

http://bulletin.accurateshooter.com/2015/02/does-barrel-twist-rate-affect-muzzle-velocity-litz-test/

They measured velocity, but velocity correlates to pressure.

Did you see this forum: https://www.longrangehunting.com/threads/rl26-and-6-5-creedmoor.192716/page-2

 

[Hawk in WY]

Some of those loads are not for the faint of heart.

Those will be fine until one day they are not like on a warm sunny afternoon.