i think if you're gonna go with a gas ram, go with a theoben from dave slade...the quality and consistancy from product to product is just mch better. personally, i like a good tuned springer instead of a gas ram...but thats just me...it also makes the internals quiet, and really improves the gun...why do you want so much power for the attic though? i would go with a muilti-pump gun, or co2, so you don't have to worry about the pellets doing damage to your home.
hey gene, do you tune the recon, and nitro? if so, one of these might be something to look at for your problem...
Dave