Well....not that what you say is wrong, but there are more than one way to skin a cat. In the end of the day, customers pays for the warranty. Does everyone need unlimited warranty? Scope technology has been accelerating for the last 20 years. Many once exotic features have trickled down and are now available on mainstream products. This trend will only continue. I got this lovely VX3 which is about 8~10 years old now. Back then it was a high end sub-100 metre target shooting scope costing $1400. Nowadays it really isnt that high end anymore. By today's standard, it has narrow adjustment range, no side focus, not very bright, no pull and push turret, etc. In 10 years time it will be decidedly average, with scopes costing a friction being as good or better. Am I really going to be bothered if my VX3 broken down and I couldnt get it repaired for free? Honestly, probably not. In the end of the day unlimited warranty is paid buy the customers, while we all like the heart warming stories of some super old/bashed up scope getting a free make over. I personally would rather have paid less to began with and not have such make over.
Brands like T-eagle is aiming for that sort of market. People who want features only found in super high end scopes of big brands that are way out of their reach, and do not mind if the product lacked after sale support. Having said that I do agree with you that good warranty is more about giving confidence than actually having to use it. Where the prices and specs are the same, the product with better warranty comes across as representing better quality. The difficulty with T-eagle, as is the case with all other Aliexpress product, is the margin is so low and shipping cost is so high, it is not economical to provide warranty support rather than the manufacture does not offer warranty support. If the product is purchased in China it will be subject to usual warranties.
Firstly let me just to be clear that my impression is that this scope can probably handle 338. Maybe .50 BMG too. The reason for this impression is that this scope is built by the same factories that make scopes for big named brands so they certainly know what they are doing. The following discussion is mostly academic.
How far can a scope handle recoil comes down to the level of engineering, tolerance, and material. Which in the end of the day, all paid by the customer. The term over-engineering refers to making something stronger better and more expensive than that is required. The questions is, how much "over-engineering" are customers willing to pay. To put things in some perspective, 308 has about 3550 J of energy, 300 Win Mag 5400 J, 50 BMG 19,000 J. 50 BMG is 5.5 times more powerful than 308. So if you are going to shoot no bigger than 308, do you need 550% redundancy? Would you pay double the price that extra 550% redundancy?
Yeah, the weight does put me off a little. Most top brand scopes with up to 16x zoom are around 450 to 500 grams. This thing is about 300 grams heavier. On the other hand I have rifles that are a couple kilograms heavier than the lighter ones and I shoot/hunt with them.
In terms of why 30mm tube, I did some further testing last night. Elevation has 7 full revolutions plus another 6 MOA of adjustment room. Each revolution is 15 MOA, that means this scope has a maximum range of 111 MOA. I tested both top end and bottom end by measuring how much the POA travels with 1 full revolution (15 MOA) from each end. Adjustments appears to be accurate even at the extreme ends. However, it appeared that when the adjustment is at the extreme low end, windage adjustment is limited. I am guessing it is because there is too much tension to prevent windage to move freely. Before I was able to test it more it started to rain so I had to stop.
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