6 BR/6 BR-A Reloaders “Sound Off”!!!

[Deputy819]

So, I didn't like how 'front heavy' the rifle was partially due to the HS Precision butt-stock being hollow on this particular model. So, I grabbed a 1/2" drill bit and put a hole through the recoil pad and ultimately into the hollow butt-stock cavity. Then used a mixture of zinc coated BB's and a product called 'Perfect Cast' (I'll provide the Amazon link to that) and filled that sucker up!! I'll finish filling the hole flush with the recoil pad with some silicone and forget all about it! This is gonna work out nicely, I think. Definitely added some weight and deadened the 'hollow sound' completely.


By the way….the 'Perfect Cast' reaction with water is exothermic and sets up completely in about an hour.

https://www.amazon.com/dp/B08XWFGH67?tag=lrhmag19-20

 

[Deputy819]

Yes sir.

Awesome! Have you done any 'work' in the BR/BRA platform with Reloader 15.5?

 

[wasskeet]

In a 6 BRA RL 15.5 is the main powder I have used. It does very well. Have ran up to 32.4gr behind a 103 VT. That gave me about 2950-2955 with SD of less than 7 across the last 15 rounds. I'd suggest starting at 31gr or a few tenths under.

 

[Deputy819]

In a 6 BRA RL 15.5 is the main powder I have used.

Nice! A LGS in my jurisdiction has several pounds of that stuff not going anywhere…..yet. How does it compare to H4350?

 

[wasskeet]

Nice! A LGS in my jurisdiction has several pounds of that stuff not going anywhere…..yet. How does it compare to H4350?

It is less bulky than H4350, you can actually pressure out with 15.5. I never could get enough H4350 in this size case to have too much. The de-coppering agent in it seems to work and doesn't seem to be too temp sensitive. Speeds/pressure will change somewhat but not major swings.

 

[mudflap621]

View attachment 620726
Seating depth test today with the Berger 108gr Elite Hunter.

For giggles I'd try running those 108s out .050"-.060" off the lands. I'm on my 3rd custom BRA barrel and my last two were more consistent out there. I've found that if I stay around around 2800fps and .060" they just shoot. My current barrel I didn't do any load workup just stuck to this recipe and it's been working very well I just crested 1200 round on it.

As far as round count I pulled the last two barrels at 2500 and 2700ish. Both started to slow down and started seeing SDs start creeping up. For my uses it was time to pull them but they still shoot pretty small groups.

After 3 BRA barrels I am going back to the BR. Just started breaking in a 5x5 barrel that looks very promising. I've always preferred to run these around 2780-2800 and honestly I can do that easily with the BR and it takes one step, fireforming, out of the process.

 

[Deputy819]

For giggles I'd try running those 108s out .050"-.060" off the lands.

I shot -.040 and -.080 off the lands during seating depth testing and the rifle didn't group well there with the 108's. Jammed .010 and -.020 off the lands shot the best for me.