What would BeerSmith say for this PB Milk Stout?

[Mechphisto]

Heyas. Strange question, maybe...
I can't afford BeerSmith right now, but would sure love to know what it would say the gravities and IBU on this recipe would be:

PRIMARY (2 weeks)		
10 oz	Caramel Malt - Crystal 80L (Great Western)	
4 oz	Black Patent Malt	
4 oz	British Roasted Barley	
10 oz	Golden Naked Oats	
1 box	Peanut Butter Capt Crunch	
7 lbs	Dark Liquid Malt Extract (LME)	
2 oz	Fuggles (5.3%)	
1.5 lbs	Lactose	
.5 lbs	Corn Sugar (glucose)	
1 tab	Whirlfloc	
1 pkg	Safale US-05	
SECONDARY (separate -- by itself during last 1 primary week)		
2 cup	Vodka or Whiskey	
1 oz	Pure Vanilla Extract	
2 oz	Cocoa Nibs	
16 oz	PB2	
16 oz	Chocolate PB2	
SECONDARY (together -- gently blend primary and separate together into secondary for addtional week)		
BOTTLING (2 weeks)		
		
4 oz	Corn sugar (measure by weight, not volume)

I plugged it into BrewersFriend and got:
OG 1.070
FG 1.022
ABV 6.22%
IBU 34.06
SRM 36.88

But I know the two apps tend to have differences...
We did the primary last night, and the OG was 1.072, so, not too bad!

Anyway, if anyone might be willing to plug this into a BeerSmith and lemme know, I really sure would appreciate it.

Thank you!
Liam

 

[Oginme]

What are your losses for grain absorption? Boil off rate?? Steeping efficiency??? Trub losses????

You have Golden Naked Oats and a starch based cereal (OK, sugar and starch) in the formulation. You really need a mini mash to convert these starches to sugars and I don't see a diastatic (base) malt which will supply the enzymes to convert the starches into fermentable sugars.

BeerSmith, being a modeling program, needs to reflect your brewing losses and conditions to give you good answers. Most programs do.

 

[Mechphisto]

What are your losses for grain absorption? Boil off rate?? Steeping efficiency??? Trub losses????

You have Golden Naked Oats and a starch based cereal (OK, sugar and starch) in the formulation. You really need a mini mash to convert these starches to sugars and I don't see a diastatic (base) malt which will supply the enzymes to convert the starches into fermentable sugars.

BeerSmith, being a modeling program, needs to reflect your brewing losses and conditions to give you good answers. Most programs do.

Well, I usually just use default values for things like efficiency etc. that BrewersFriend and the trial version of BeerSmith provided, and in the past that has generally given me nearly exact OG and FG predictions.

But I guess I have no idea what I'm doing because I've only ever done extract brewing, and in the several ingredient kits I've done before making my own recipe, they always just provided grains to steep before boiling the rest. So, that's just what I've modeled my last few own recipes from... and looking at other extract brewing recipes. Never have I seen anything about mini mashes being necessary.

I get there's a lot of chemistry one can rabbit hole down in brewing, I'm afraid to admit I have more fun coming up with recipes than I do figuring out water mineral components and boil efficiency. Yay people who do, but that's not me.

This is essentially the same ingredient list I used for an Irish Car Bomb I made a few months ago (obv without the PB, and a few small changes), and it was amazing, and got a lot of compliments from friends who normally stay away from homebrew. (I live in Portland... no one here ever has to drink bad beer.) So... I guess I'm doing something ok... maybe not perfect or the best, but not "wrong."

Thanks for taking the time to reply!