Buying Light Beer is like buying that anti-freeze that is pre-mixed 50/50 with water but costs nearly the same as full strength anti-freeze. Much of the caloric reduction in Light Beer comes from reducing alcohol content. You might as well buy regular beer and water it down. Of course, if you are buying expensive bottled water to water down your beer, you're right back to Stupidville. I never thought either product would be successful, but I guess I underestimated the stupidity of a large portion of the population. Must be the 47% low information voters who are buying the stuff.
Back to the original topic... there are two very good reasons to not lengthen the chambers of a Parker. Your eyeballs. The frequently posted picture of the blown-up Baker with the reamer marks left in the fragmented chamber area suggest it just isn't worth it. You didn't say if your gun is fluid steel or Damascus, or if it is a 7 lb. 4 oz. 16 gauge, or a small frame 6 pounder. If the job is done correctly by a competent double gunsmith, it might be OK, but why take the risk (and expense) and reduce the value of a collectible vintage double when there are very cost effective alternatives like handloading or buying 2 1/2" low pressure loads from RST or B&P? Even if you lengthen the chambers, you will still want to use lighter lower pressure loads that are easier on the bolting surfaces and old wood.
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