22lrman

I know someone bought from Amazon USA a few weeks ago and paid duties and shipping.

Let me know if they dont get collected. Ill have them

On 8/13/2018 at 1:46 PM, Malxwal said:

Looking at this change to burn rate, has piqued my interest, mainly in understanding more. I tried changing the burn rate for my own load using Nosler 125gr bullets, and see that only a change up to 0.5100 is required to match my chrono'd velocities of 3010. Looking at it, the given value of 0.5045 gives a velocity of 20fps lower for my load.

So, modifying burn rate only applies to a given load, , in this case the 150gr and up bullets; if using 0.55 in my other loads/rounds, they subsequently appear to be over pressure.

What other factor should be changed as a constant so that RS52 QL data can be more accurate across the board ?

This was ONLY adjusted for the RS52 powder batch I have and in my gun/ chrono combination. As QL was no where near on velocity to what I measured.

if your QL is within 20fps I would leave the Ba alone. Mine was around 100fps out. 

i leave settings the same for all other powders.

I don’t reccomend changing it  unless you know exactly what you are doing . It can get you in to trouble pressure wise. If you are only playing around with QL for learning that’s a great way to learn, but please make a clearly labelled copy of the powder file in case you accidentally save your new settings in to the original powder file name. And get it mixed up later . 

Happy learning. 

On 8/13/2018 at 11:30 AM, Nocrimp said:

Just to be certain......

.22LRman,  is that the "Burning Rate Factor  Ba" that you changed to 0.55 (from 0.5045)?

Many Thanks

Yes it was the Ba I changed to match my velocity.

Now I should mention you will do this at your own risk and ONLY if you are confident you know what you are doing.

You also have to get all of your other data correctly entered ,such as ambient temp,   cartridge volume, barely length, oal etc and you are confident your chrono is accurate. 

I reduced a grain, and again compared chrono results with quick load results , just for sanity sake . It stayed reasonably close, so I am more confident in its results now. 

My jump is 100 thou + on a Remington 700. So I’m confident my pressures are safe. But please work up safely. 

On 8/9/2018 at 8:07 PM, Dazfie said:

Hi guys,

If this helps my max load was 44.3 as  I started to get flattened primers after that!

Rs52 - 44.3gns 

155 scenar

Lapua brass 

1in 12 twist 26" barrel

Average 2800+ fps

Just for info, I managed 46.2 gn for an accuracy node, the primers were quite flat but not flowed in to the edges of the primer pocket. Bolt lift was not heavy /stiff , but stiffer than a new/full length sized case. 

155HBC, KVB primer, fire formed lapua brass, 2.86 OAL .26” barell, 1/12 twist. 2885 FPS.

DO NOT trust QL data with RS52, as mentioned above I adjusted burn rate to 0.55 to get reasonably close results.