Help with RIS water profile

Hello all,

I'm trying to build my water profile from RO water. I was hoping I could get any input / advice on where I've landed, so far. I'm most concerned with my overall ion levels and their ratios, and particularly my SO4/Cl ratio of 0.96. I was thinking of something more in line with 1.3, but ended up around 1. How do you all feel about this ratio for this beer? This is the first time I've tried to build my own water, so all help is appreciated. I do not plan to acidify my sparge water, but instead add it to the boil. The recipe below is going to be brewed using two independent mashes and runoffs combined before the boil, in order to avoid an overfilled mash tun. Thanks.


Est Original Gravity: 1.101 SG
Est Final Gravity: 1.032 SG
Estimated Alcohol by Vol: 9.2 %
Bitterness: 87.5 IBUs
Est Color: 53.5 SRM

10 lbs 10.4 oz Pale Malt (2 Row) UK (3.0 SRM) Grain 1 80.8 %
1 lbs 0.4 oz Roasted Barley (300.0 SRM) Grain 2 7.8 %
10.9 oz Special B Malt (180.0 SRM) Grain 3 5.2 %
8.2 oz Chocolate Malt (450.0 SRM) Grain 4 3.9 %
5.0 oz Cara-Pils/Dextrine (2.0 SRM) Grain 5 2.4 %
3.59 oz Challenger [5.70 %] - Boil 60.0 min Hop 6 74.7 IBUs
0.77 oz Goldings, East Kent [5.90 %] - Boil 30.0 min Hop 7 12.7 IBUs


Water Adjustment Summary

Calcium (ppm) Magnesium (ppm) Sodium (ppm) Sulfate (ppm) Chloride (ppm) Bicarbonate (ppm)

Existing Water Profile 0 0 0 0 0 1
Finished Water Profile 92 5 54 43 45 225

Mash Parameters
Batch Volume (gal) 6.48
Hardness (ppm as CaCO3) 250
RA (ppm as CaCO3) 118
Estimated Mash pH 5.5

I've done a couple RIS beers like this and don't think the water profile is very important. Just do your typical 50-80 calcium, and use gypsum and/or CaCl. Don't worry much about that ratio.

P.s. I'd also suggest dropping IBUs to 70-75. Just my 2c.

This beer is going into a 5 gallon barrel. I understand that hop compounds can bind the barrel, reducing overall IBUs. When it has properly aged, I believe it will come in under 87 IBUs. Any experience with this?