Tuning Beeman R7 .177

[Teber66]

When I got it new last year I put a tune kit in it right off the bat.
Maccari tune kit
ARH piston seal
Spring
Spring guide
Top hat
ARH tar/lube
After about a tin of pellets I shot 25 JSB 7.33 over my chrono

Hi: 647
Lo: 641
Avg: 643
ES: 6
Sd: 2.3
FP: 6.73

The other day I tore it apart and cleaned the lube off of it, put a Vortek piston seal on it and relubed with Krytox 205. Leaving the rest of the Maccari parts in. After 250 pellets I shot 25 JSB 7.33gr pellet over my chrono.
Hi: 731.3
Lo: 723.2
Avg: 726.4
ES: 8.1
SD: 2.26
FP: 8.59

I didn’t expect this much of a change in velocity , it really surprised me. That’s a 83fps gain. Has anyone else seen that by switching piston seals and lube?

 

[iAMzehTOASTY1]

Not internally but on externally accessible areas and had varying results with different applications as well

 

[SteveP-52]

Not on an R7, mine are still factory, but I have a D34 with an ARH spring kit that shot better numbers with a Vortex piston seal vs the ARH.

 

[Bear-of-Grayling]

Both of my HW30/R7 have the Vortek kit with the Vortek piston seal. They both hit the lower 700’s. The difference is probably the seal. Lot of folks swear by the Vortek piston seal.

 

[Hateful McNasty]

Probably the arh seal was needing to be fit or refit (sizing) . Theres some trial and error so to say fitting one in and getting it just right.. i guess vortek being more a drop in makes it more popular or less fuss seal ?

 

[Mycapt65]

The vortek seal is worth roughly 30-40 fps over typical parachute seals. They are are my preferred seals.

 

[Teber66]

I thought I did a good job of fitting the ARH seal but I’m doubting myself now . After shooting it today I’ve got right at a tin through it. I’ll put another couple hundred through it in the coming days and see where it levels out at. Winds died down quite a bit this evening so I went out and put a few more rounds through it. Got a good zero then took it out to 66yds on my prairie dog. Wind was ever so slight from my left but only needs .2 mils for wind and held 5.5 mils for elevation.

Those are three different groups using the Falcon 7.33. Was feeling cocky and shot the group up on the head. I had 3 misses on it. I’m thinking this little R7 is gonna shoot good in light winds.