BrewDog Jackhammer Clone - hop schedule dilemma (Columbus and Centennial)

Sorry to resurrect an old post, but did you ever have a go at this? Fancy trying this myself.

Yeah I did. Made a few alterations as they state on the website that it contained Centennial and Columbus, Dry hopped with Citra, Amarillo and Simcoe.

I need to revisit it as my beer got an infection in the bottle so was undrinkable in the end!

I think the way to go is bitter with columbus then add columbus and centennial in equal amounts about 10 mins from the end of the boil and at flame out. Then I would dry hop with the above hops with pellets for 5 days.

I would also add lots of gypsum to the mash so those hops can shine through!

If you have a bash at it let me know how it turns out! cheers

What malt bill did you go with?

I'm going to give this a shot in the new year. Buying bottles of Jackhammer is getting expensive!

CaptainBrooksie said:

What malt bill did you go with?

I'm going to give this a shot in the new year. Buying bottles of Jackhammer is getting expensive!

Click to expand...

Sorry for the delay in replying!
this is what I did do

Original Gravity (OG): 1.060 (°P): 14.7
Final Gravity (FG): 1.011 (°P): 2.8
Alcohol (ABV): 6.45 %
Colour (SRM): 4.0 (EBC): 7.9
Bitterness (IBU): 196.8 (Average)

98.93% Extra Pale Spring Blend
1.07% Crystal 30

All leaf hops
2.2 g/L Centennial (10.3% Alpha) @ 61 Minutes (Boil)
2.2 g/L Columbus (18.3% Alpha) @ 61 Minutes (Boil)
1.9 g/L Centennial (10.3% Alpha) @ 16 Minutes (Boil)
1.1 g/L Columbus (18.3% Alpha) @ 16 Minutes (Boil)
0.7 g/L Centennial (10.3% Alpha) @ 5 Minutes (Boil)
0.3 g/L Columbus (18.3% Alpha) @ 5 Minutes (Boil)
3.7 g/L Amarillo (8.6% Alpha) @ 15 Days (Dry Hop)
3.7 g/L Citra (11.1% Alpha) @ 15 Days (Dry Hop)
3.7 g/L Simcoe (12.2% Alpha) @ 15 Days (Dry Hop)

0.0 g/L Epsom Salt (MgSO4) @ 0 Minutes (Mash)
0.4 g/L Gypsum (Calcium Sulfate) @ 0 Minutes (Mash)

Single step Infusion at 65°C for 90 Minutes. Boil for 61 Minutes

Fermented at 21°C with Safale US-05


I would now change it to

JH Clone

Original Gravity (OG): 1.067 (°P): 16.4
Final Gravity (FG): 1.012 (°P): 3.1
Alcohol (ABV): 7.20 %
Colour (SRM): 4.3 (EBC): 8.4
Bitterness (IBU): 198.7 (Average)
Efficiency 68%

99.03% Extra Pale Spring Blend (or pale marris otter or just marris otter dropping the crystal malt)
0.97% Crystal 30

2.2 g/L Centennial (10.3% Alpha) @ 60 Minutes (Boil) Leaf
2.2 g/L Columbus (18.3% Alpha) @ 60 Minutes (Boil) Leaf
1.1 g/L Columbus (18.3% Alpha) @ 30 Minutes (Boil) Leaf
0.3 g/L Columbus (18.3% Alpha) @ 20 Minutes (Boil) Leaf
1.9 g/L Centennial (10.3% Alpha) @ 10 Minutes (Boil) Leaf
0.7 g/L Centennial (10.3% Alpha) @ 5 Minutes (Boil) Leaf
3.7 g/L Amarillo (8.6% Alpha) @ 0 Days (Dry Hop) Pellet
3.7 g/L Citra (11.1% Alpha) @ 0 Days (Dry Hop) Pellet
3.7 g/L Simcoe (12.2% Alpha) @ 0 Days (Dry Hop) Pellet

0.55 g/L Gypsum (Calcium Sulfate) @ 0 Minutes (Mash)

Irish moss addition @ 15 Mins

Single step Infusion at 65°C for 90 Minutes. Boil for 60 Minutes

Fermented at 20°C with Safale US-05

I guess the main difference is I'd ease back on late additions of the Columbus as it can get a bit dank if added to late. Also dry hop with pellets.

With the dry hop I would dose the beer with half of the bill for 4 days at 14°C rack off the hops then throw the rest on for another 4 days then chill to 10°C to drop everything out then bottle.

I'm not too fussed on fining. Also I would add 18g of yeast to get it going then after 3 days add the further 4g (two sachets in total) to make sure it fermented to TG.

Hope this may help you - let me know if you try a recipe!