I recently put an ARH indoor plinkers kit into a relatively new .177 hw50s (with a Vortek seal). I've tried a lot of kits, and IMHO the PK is an ideal match for the 50.
This gun was purchased about one year ago. Right out of the box, it shot at about 12fpe. Accuracy was good, but not as good as my hw30s, my hw97k, or my pro sport. The 97k and PS are both tuned to 12fpe. The 50's shot cycle was more abrupt than my other guns.
Tinkering is part of the fun with spring guns, and I tried a couple different drop in kits. The Vortek kit was still too snappy and powerful, but the standard ARH kit gave power of 11fpe, with a better shot cycle and improved accuracy. With the standard ARH kit, the 50 became my primary woods hunting gun, and my second favorite plinker behind the hw30s. But there was still a small accuracy deficit versus my other springers. I did a bunch of benchrest shooting at 20 yards, and just could not get the 50 to group as tightly as my 30 or 97k.
When I compared the power to weight ratio of these guns, the 50 was notably higher than the others. All guns were weighed as is with scopes. They were 1.03 for the hw30s (7fpe/6.81lbs), 1.08 for the 97k (12fpe/11.1lbs), and 1.39 for the hw50s (11fpe/7.91lbs). At 12fpe, the ratio for the 50 would be 1.51.
I have experience with the ARH IPK in another 50, and was expecting something in the 9-9.5fpe range. After installing the new PK, power was 9.5fpe, and accuracy was noticeably better. In a feeble effort to get closer to 9fpe, I left the gun cocked for about 5 days. No change, still at 9.5fpe, so at some point I'm going to have to clip a coil off the spring. At 9fpe, the power to weight ratio would be 1.14.
For me, the lesson learned is that the 50 comes over-sprung from the factory. I'm not sure if the power to weight ratio is a legit metric for comparison, but I sure do notice an improvement in accuracy in guns with lower ratios. Interestingly, only the hw30s comes from Weihrauch with a power to weight ratio near 1.0, which may explain its popularity. I also suspect that the naming of the ARH IPK deters some buyers because they don't intent to plink indoors. For all-round use in a 50, I'd suggest giving it a try. For me, the 50 is a better overall package in the 9-9.5fpe range.
R
This gun was purchased about one year ago. Right out of the box, it shot at about 12fpe. Accuracy was good, but not as good as my hw30s, my hw97k, or my pro sport. The 97k and PS are both tuned to 12fpe. The 50's shot cycle was more abrupt than my other guns.
Tinkering is part of the fun with spring guns, and I tried a couple different drop in kits. The Vortek kit was still too snappy and powerful, but the standard ARH kit gave power of 11fpe, with a better shot cycle and improved accuracy. With the standard ARH kit, the 50 became my primary woods hunting gun, and my second favorite plinker behind the hw30s. But there was still a small accuracy deficit versus my other springers. I did a bunch of benchrest shooting at 20 yards, and just could not get the 50 to group as tightly as my 30 or 97k.
When I compared the power to weight ratio of these guns, the 50 was notably higher than the others. All guns were weighed as is with scopes. They were 1.03 for the hw30s (7fpe/6.81lbs), 1.08 for the 97k (12fpe/11.1lbs), and 1.39 for the hw50s (11fpe/7.91lbs). At 12fpe, the ratio for the 50 would be 1.51.
I have experience with the ARH IPK in another 50, and was expecting something in the 9-9.5fpe range. After installing the new PK, power was 9.5fpe, and accuracy was noticeably better. In a feeble effort to get closer to 9fpe, I left the gun cocked for about 5 days. No change, still at 9.5fpe, so at some point I'm going to have to clip a coil off the spring. At 9fpe, the power to weight ratio would be 1.14.
For me, the lesson learned is that the 50 comes over-sprung from the factory. I'm not sure if the power to weight ratio is a legit metric for comparison, but I sure do notice an improvement in accuracy in guns with lower ratios. Interestingly, only the hw30s comes from Weihrauch with a power to weight ratio near 1.0, which may explain its popularity. I also suspect that the naming of the ARH IPK deters some buyers because they don't intent to plink indoors. For all-round use in a 50, I'd suggest giving it a try. For me, the 50 is a better overall package in the 9-9.5fpe range.
R
