There's one other option to increase the shot count and consistency for your unregulated Marauder. It's the Archer Airguns XP Tune Kit. It costs just $19.99, comes with full instructions and can give you a HUGE increase in consistent shots with your .177 caliber Marauder. Yet it's very easy to install.
Here's a couple of graphs showing test results for two individual guns shot with (green) and without (red) the XP Tune Kit. Note the different x - horizontal - axis on the two graphs. I started out testing to 50 shots and realized that it would go further. My guess was 70 consistent shots, but the final results can be far beyond that, as the graphs show...
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You can read more about it in these three Hard Air Magazine posts:
Following the summary of benefits published in the previous post, today we’ll look at more test data for the Benjamin Marauder and Armada Tune Kit.
hardairmagazine.com
This new Benjamin Marauder Tune Kit that can provide significant improvements to the performance of any UNREGULATED Benjamin Marauder or Armada air rifle.
hardairmagazine.com
So what’s happening when the Benjamin Marauder and Armada Tune Kit operates? It’s best to think of the Tune Kit as having a “regulator lite” effect.
hardairmagazine.com
Full disclosure. I developed this Tune Kit and it's sold through my retail parts store at
Tune Kit for Benjamin Marauder and Armada Air Rifles. Add 100 FPS or double shot count.
Maybe it could be worth trying?