L
lcbcp
Guest
Customer recently brought in a Christensen Arms Extreame rifle with a broken scope mount screw. Seems the front screw was a bit too long and he could'nt get it to tighten...oh well. He then informs me it has a titanium action....well it was magnetic and all of the other titanium items I have worked with were not, so I worked the job same as any other, because the broken front screw was inbedded into the barrel threads I had to drill it out carefully and finish with a small end mill. Successful operation....anyway is there a magnetic titanium? It also had a carbon fiber wraped barrel that the manf. claims the following:
# Graphite barrel casing is 3-4 times stronger than steel – Meaning Safety
# Graphite barrel casing is 4-5 times stiffer than steel/per weight – Meaning Better accuracy
# Graphite/epoxy barrel casing is 5-6 times lighter than steel – Meaning comfort and mobility
# Graphite barrel casing is 100% weatherproof – Meaning Durability
# Graphite barrel lining is match grade 416R stainless steel – Meaning Quality
# Graphite increases barrel life by approximately 25% - Meaning longevity
# Graphite barrels have a zero coefficient of thermal expansion – Steel barrels expand and contract with temperature changes (hot or cold). Since the temperature through the barrel is not uniform, it causes a steel barrel to warp. These effects cause the bullet point of impact to change. Christensen carbon barrels do not move with temperature change, meaning accuracy shot after shot. Christensen Arms carbon barrels are unaffected by external temperature as well. No matter how hot or cold the weather is that you are hunting in, your first shot accuracy will not be affected.
Well I have some doubts about some of the claims, mainly how can the carbon barrel be 3-4 times stronger than steel if the thermal coeffieient is "0" seems to me the liner will expand and the carbon wrap will not and therefore the two cannot be bonded in any meaningfull way. In my experience any kind of epoxy fiber tends to act as a insulator rather than a conductor of energy, so it would seem to me to increase the heat problem??? If this material is as strong as claimed why bother with a steel liner barel?? It also seems that they just cut down a stock rem. barrel to achieve the carbon wrap feature, how the hell does that improve anything? Seems to me any tendency of the carbon wrap to counteract any warp would be off-set by turning down the barrel. The barrel seemed to be well chambered, but very rough bore, and well coated with copper....the owner says only 10 shots. The owner also claims a less than 1 inch group @ 100 yds. I explained to the owner that I loved the light weight and great handling of the rifle and if it would shoot a 2 " group @ 100 yds, I'd be happy, but to bring 20 or so rounds when he picked it up and we could check it out down on my range, my mistake, so far no show. Anyway any opinions, other than my dumb ass invitation to actually shoot it, I an already aware that that was stupid on my part.
# Graphite barrel casing is 3-4 times stronger than steel – Meaning Safety
# Graphite barrel casing is 4-5 times stiffer than steel/per weight – Meaning Better accuracy
# Graphite/epoxy barrel casing is 5-6 times lighter than steel – Meaning comfort and mobility
# Graphite barrel casing is 100% weatherproof – Meaning Durability
# Graphite barrel lining is match grade 416R stainless steel – Meaning Quality
# Graphite increases barrel life by approximately 25% - Meaning longevity
# Graphite barrels have a zero coefficient of thermal expansion – Steel barrels expand and contract with temperature changes (hot or cold). Since the temperature through the barrel is not uniform, it causes a steel barrel to warp. These effects cause the bullet point of impact to change. Christensen carbon barrels do not move with temperature change, meaning accuracy shot after shot. Christensen Arms carbon barrels are unaffected by external temperature as well. No matter how hot or cold the weather is that you are hunting in, your first shot accuracy will not be affected.
Well I have some doubts about some of the claims, mainly how can the carbon barrel be 3-4 times stronger than steel if the thermal coeffieient is "0" seems to me the liner will expand and the carbon wrap will not and therefore the two cannot be bonded in any meaningfull way. In my experience any kind of epoxy fiber tends to act as a insulator rather than a conductor of energy, so it would seem to me to increase the heat problem??? If this material is as strong as claimed why bother with a steel liner barel?? It also seems that they just cut down a stock rem. barrel to achieve the carbon wrap feature, how the hell does that improve anything? Seems to me any tendency of the carbon wrap to counteract any warp would be off-set by turning down the barrel. The barrel seemed to be well chambered, but very rough bore, and well coated with copper....the owner says only 10 shots. The owner also claims a less than 1 inch group @ 100 yds. I explained to the owner that I loved the light weight and great handling of the rifle and if it would shoot a 2 " group @ 100 yds, I'd be happy, but to bring 20 or so rounds when he picked it up and we could check it out down on my range, my mistake, so far no show. Anyway any opinions, other than my dumb ass invitation to actually shoot it, I an already aware that that was stupid on my part.
