I just finished sealing up a new to me gen1 marauder, in 25 caliber. It supposed to have a modified valve and heavier hammer spring. I'm wanting to use it exclusively for slugs, if possible. Are the barrels choked? And if so, will slugs shoot well? If a choked barrel is tighter, could I use smaller diameter (.249/.248) slugs?
Tuning Gen1 marauder barrels?
- Thread starter wormbobskey
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id get a couple of them and slug the barrel .. find one that pushes through with a decent amt of resistance but not stiff.
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dizzums, are you talking about removing the barrel and pushing a slug through the breech or just through the end of the barrel? Sorry if it seems like a stupid question, but I have never slugged a barrel before.
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The original .25 cal Marauders were fitted with a choked Green Mountain barrel. Very well-regarded barrels for shooting pellets. The twist rate and presence of a choke do not generally make for a good slug shooter but there are exceptions so you may want to experiment.
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I am pretty sure all of the Crosman barrels are choked. You can likely just pull a patch through and pay attention to the last couple of inches to see if it gets tighter, at the crown end, if you want.
Hard to say what slug size would shoot best but with so many available these days I'm pretty sure you can find one that will shoot. Probly best to look around or ask around on the forums and find someone that is shooting a slug well to save some money.
There is a bit more to slugging a barrel than just pushing a pellet down it.
https://www.youtube.com/watch?v=2lMp_nahuMI&ab_channel=Tofazfou
Hard to say what slug size would shoot best but with so many available these days I'm pretty sure you can find one that will shoot. Probly best to look around or ask around on the forums and find someone that is shooting a slug well to save some money.
There is a bit more to slugging a barrel than just pushing a pellet down it.
https://www.youtube.com/watch?v=2lMp_nahuMI&ab_channel=Tofazfou
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If you have the factory green Mountain barrel they are no longer available so probably best not to modify it.
They are supposed to be lights out accurate near moa at 100 yards shooting pellets.
Search function can help. Especially when this site isn't running slow.
https://www.airgunnation.com/topic/marauder-barrel-options/
They are supposed to be lights out accurate near moa at 100 yards shooting pellets.
Search function can help. Especially when this site isn't running slow.
https://www.airgunnation.com/topic/marauder-barrel-options/
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You can try different slugs. I have a heavily modded gen 1. It likes FX 26 gr Hybrids kind of. I'm still playing with the tune. It's kind of a trial and error thing. I have the green mountain barrel. I can get one hole groups with the kings, king heavies, and hades. I've tried many slugs not very satisfactory results.
Jim
Jim
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I have some of the FX hybrid slugs. My gen2 25 didn't much care for them. Is there any way to tell if the gen1 has the green mountain barrel? I'm assuming the valve and hammer spring were the only things changed. I appreciate all the information. Maybe I'll just set this one up to shoot the 34 gr JSB's and keep the gen2 zero'd with the lighter JSB's.
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All the Gen 1 25 cals came from crosman with GM barrels. The original Gen 2's did as well. Mid-production they changed to their own barrels.
If you got it used, it might have been swapped out, but not that likely. It has more lands than the crosman barrel, but don't remember off the top of my head. Maybe 10?
Both the GM and Crosman 25 barrels are choked, and generally don't shoot slugs well. I wouldn't mess with a good GM barrel that shoots pellets well, to try to make it better for slugs.
The G2 Mrod had a better balance of tuning. Lower Es strings. Mainly from the valve change and hammer spring change. Both will retrofit into a G1.
There were other parts that changed in G2, including the trigger assy. Many like the G1 better. Baffles are better in G2 and retrofitable w/spring.
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