depending on how well the oil is contained in the back half of his marker, it may not be an issue. What could be an issue, is the fact that it is actually gritty (ultra fine none the less, but still a form of grit). I'm not sure if graphite would wear down the bolt, because it's plastic, as well as the o-rings. I think I would stay with the teflon idea, because it's a petrol based distillate, and contains no grainy particulate.

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skipped the graphite. Used a dry teflon powder alos used for the same purpose. This time I made sure to try and oil judiciously as opposed to simply flooding the marker.

Some gun oils and aerosols will eat rubber over time and some plastics, just be aware of this (petroleum distillates for propellant, or has "detergents"). mixing graphite with a light grease works well, but is probably overkill for this app since you're cleaning every other event. The plastic bolt in theory should not gall the aluminum. I remember Muddy mentioning seeing grooves from a JCS hex cut bolt though so take that with a grain of salt

PTFE is a white solid at room temperature, with a density of about 2.2 g/cm³. According to DuPont its melting point is 327 °C (620.6 °F), but its properties degrade above 260 °C (500 °F).[7]
The coefficient of friction of plastics is usually measured against polished steel.[8] PTFE's coefficient of friction is 0.1 or less[7], which is the second lowest of any known solid material (Diamond-like carbon being the first). PTFE's resistance to van der Waals forces means that it is the only known surface to which a gecko cannot stick.[9]
PTFE has excellent dielectric properties. This is especially true at high radio frequencies, making it suitable for use as an insulator in cables and connector assemblies and as a material for printed circuit boards used at microwave frequencies. Combined with its high melting temperature, this makes it the material of choice as a high-performance substitute for the weaker and lower melting point polyethylene that is commonly used in low-cost applications. Its extremely high bulk resistivity makes it an ideal material for fabricating long life electrets, useful devices that are the electrostatic analogues of magnets.
Because of its chemical inertness, PTFE cannot be cross-linked like an elastomer. Therefore it has no "memory," and is subject to creep (also known as "cold flow" and "compression set"). This can be both good and bad. A little bit of creep allows PTFE seals to conform to mating surfaces better than most other plastic seals. Too much creep, however, and the seal is compromised. Compounding fillers control unwanted creep and improve wear, friction, and other properties. Sometimes metal springs apply continuous force to PTFE seals to give good contact, while permitting some creep.

[edit] Applications


The roof of the Hubert H. Humphrey Metrodome is made of 20 acres of teflon-coated fiberglass


Due to its low friction, it is used for applications where sliding action of parts is needed: bearings, bushings, gears, slide plates, etc. In these applications it performs significantly better than nylon and acetal; it is comparable to ultra high-molecular weight polyethylene (UHMWPE), although UHMWPE is more resistant to wear than Teflon. For these applications, versions of teflon with mineral oil or molybdenum disulfide embedded as additional lubricants in its matrix are being manufactured.
Gore-Tex is a material incorporating fluoropolymer membrane with micropores. The roof of the Hubert H. Humphrey Metrodome in Minneapolis is one of the largest applications of Teflon PTFE coatings on Earth, using 20 acres (about 8 hectares) of the material in a double-layered, white dome, made with PTFE-coated fiberglass, that gives the stadium its distinctive appearance. The Millennium Dome in London is also substantially made of PTFE.
Powdered PTFE is used in pyrotechnic compositions as oxidizer together with powdered metals such as aluminium and magnesium. Upon ignition these mixtures form carbonaceous soot and the corresponding metal fluoride and release large amounts of heat. Hence they are used as infrared decoy flares and igniters for solid-fuel rocket propellants.[10]
PTFE is also used in body piercings, such as a sub-clavicle piercing, due to its flexibility and bio-compatibility.
In optical radiometry, sheets made from PTFE are used as measuring heads in spectroradiometers and broadband radiometers (e.g. illuminance meter and UV radiometer) due to its capability to diffuse a transmitting light nearly perfectly. Moreover, optical properties of PTFE stay constant over a wide range of wavelengths, from UV up to near infrared. In this region, the relation of its regular transmittance to diffuse transmittance is negligibly small so light transmitted through a diffuser (PTFE sheet) radiates like Lambert's cosine law. Thus, PTFE enables cosinusoidal angular response for a detector measuring the power of optical radiation at a surface, e.g., in solar irradiance measurements.
PTFE is also used to coat certain types of hardened, armor-piercing bullets, so as to reduce the amount of wear on the firearm's rifling. These are often referred to as "cop-killer" bullets by virtue of PTFE's supposed ability to ease a bullet's passage through body armor. However, this is simply an urban myth as PTFE has no effect in the bullet's ability to penetrate soft body armor.[citation needed]
PTFE's low frictional properties have also been utilized as computer mice feet such as the Logitech G5 and Logitech G7 computer mice series from Logitech or most Razer gaming mice (e.g the Deathadder, Lachesis). The low-friction provided by PTFE allows the mice to be moved and glide across surfaces smoothly and with less effort.
PTFE's high corrosion resistance makes it ideal for laboratory environments as containers, magnetic stirrers and tubing for highly corrosive chemicals such as hydrofluoric acid, which will dissolve glass containers.
PTFE can be used as a thread seal tape in plumbing applications.
PTFE grafts can be used to bypass stenotic arteries in peripheral vascular disease, if a suitable autologous vein graft is not available.
PTFE can be used to prevent insects climbing up surfaces painted with the material. PTFE is so slippery that insects cannot get a grip and tend to fall off. For example PTFE is used to prevent ants climbing out of formicariums.

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the first paragraph, and the first couple of the second are the most relevant.

"Creep" is why this item is supposed to be carefully applied, because too much and it actually can hinder performance. Think of it as "dusting" the components you want covered, and you should have applied the right amount.

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I'm not sure what it could be. Try replacing the velocity screw. They're really cheap. My friend has had trouble with his before that led to spiking.